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2.6: Assignments with Samples

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The assignments in this course are openly licensed, and are available as-is, or can be modified to suit your students’ needs.

This course provides 10 prompts and grading rubrics for written assignments, designed to align with course outcomes.

If you import this course into your learning management (Blackboard, Canvas, etc.), the assignments will automatically be loaded into the assignment tool. You can view them below or throughout the course.

Contributors and Attributions

• Assignments. Provided by : Lumen Learning. License : CC BY: Attribution
• Pencil Cup. Authored by : IconfactoryTeam. Provided by : Noun Project. Located at : thenounproject.com/term/pencil-cup/628840/. License : CC BY: Attribution

Faculty Resources

Assignments.

The assignments in this course are openly licensed, and are available as-is, or can be modified to suit your students’ needs. Sample completed assignments are available to faculty who adopt Waymaker, OHM, or Candela courses with paid support from Lumen Learning. This approach helps us protect the academic integrity of these materials by ensuring they are shared only with authorized and institution-affiliated faculty and staff.

This course provides 10 prompts and grading rubrics for written assignments, designed to align with course outcomes. You can view them by clicking on the assignment links in course modules.

If you import this course into your learning management (Blackboard, Canvas, etc.), the assignments will automatically be loaded into the assignment tool. You can view them below or throughout the course.

• Assignments. Provided by : Lumen Learning. License : CC BY: Attribution
• Pencil Cup. Authored by : IconfactoryTeam. Provided by : Noun Project. Located at : https://thenounproject.com/term/pencil-cup/628840/ . License : CC BY: Attribution

• Biology Article

Cells are the basic, fundamental unit of life. So, if we were to break apart an organism to the cellular level, the smallest independent component that we would find would be the cell.

Explore the cell notes to know what is a cell, cell definition, cell structure, types and functions of cells. These notes have an in-depth description of all the concepts related to cells.

Table of Contents

Cell Definition

What is a cell, characteristics of cells, types of cells, cell structure, cell theory.

• Functions of a Cell

Cells are the fundamental unit of life. They range in size from 0.0001 mm to nearly 150 mm across.

“A cell is defined as the smallest, basic unit of life that is responsible for all of life’s processes.”

Cells are the structural, functional, and biological units of all living beings. A cell can replicate itself independently. Hence, they are known as the building blocks of life . 

Each cell contains a fluid called the cytoplasm, which is enclosed by a membrane. Also present in the cytoplasm are several biomolecules like proteins, nucleic acids and lipids. Moreover, cellular structures called cell organelles are suspended in the cytoplasm.

A cell is the structural and fundamental unit of life. The study of cells from its basic structure to the functions of every cell organelle is called Cell Biology. Robert Hooke was the first Biologist who discovered cells.

All organisms are made up of cells. They may be made up of a single cell (unicellular), or many cells (multicellular).  Mycoplasmas are the smallest known cells. Cells are the building blocks of all living beings. They provide structure to the body and convert the nutrients taken from the food into energy.

Cells are complex and their components perform various functions in an organism. They are of different shapes and sizes, pretty much like bricks of the buildings. Our body is made up of cells of different shapes and sizes.

Cells are the lowest level of organisation in every life form. From organism to organism, the count of cells may vary. Humans have more number of cells compared to that of  bacteria .

Cells comprise several cell organelles that perform specialised functions to carry out life processes. Every organelle has a specific structure. The hereditary material of the organisms is also present in the cells.

Discovery of Cells

Discovery of cells is one of the remarkable advancements in the field of science. It helps us know that all the organisms are made up of cells, and these cells help in carrying out various life processes. The structure and functions of cells helped us to understand life in a better way.

Who discovered cells?

Robert Hooke discovered the cell in 1665. Robert Hooke observed a piece of bottle cork under a compound microscope and noticed minuscule structures that reminded him of small rooms. Consequently, he named these “rooms” as cells. However, his compound microscope had limited magnification, and hence, he could not see any details in the structure. Owing to this limitation, Hooke concluded that these were non-living entities.

Later Anton Van Leeuwenhoek observed cells under another compound microscope with higher magnification. This time, he had noted that the cells exhibited some form of movement (motility). As a result, Leeuwenhoek concluded that these microscopic entities were “alive.” Eventually, after a host of other observations, these entities were named as animalcules.

In 1883, Robert Brown, a Scottish botanist, provided the very first insights into the cell structure. He was able to describe the nucleus present in the cells of orchids.

Following are the various essential characteristics of cells:

• Cells provide structure and support to the body of an organism.
• The cell interior is organised into different individual organelles surrounded by a separate membrane.
• The nucleus (major organelle) holds genetic information necessary for reproduction and cell growth.
• Every cell has one nucleus and membrane-bound organelles in the cytoplasm.
• Mitochondria, a double membrane-bound organelle is mainly responsible for the energy transactions vital for the survival of the cell.
• Lysosomes digest unwanted materials in the cell.
• Endoplasmic reticulum plays a significant role in the internal organisation of the cell by synthesising selective molecules and processing, directing and sorting them to their appropriate locations.

Also Read : Nucleus

Cells are similar to factories with different labourers and departments that work towards a common objective. Various types of cells perform different functions. Based on cellular structure, there are two types of cells:

• Prokaryotes

Explore:   Difference Between Prokaryotic and Eukaryotic Cells

Prokaryotic Cells

Main article: Prokaryotic Cells

• Prokaryotic cells have no nucleus. Instead, some prokaryotes such as bacteria have a region within the cell where the genetic material is freely suspended. This region is called the nucleoid.
• They all are single-celled microorganisms. Examples include archaea, bacteria, and cyanobacteria.
• The cell size ranges from 0.1 to 0.5 µm in diameter.
• The hereditary material can either be DNA or RNA.
• Prokaryotes generally reproduce by binary fission, a form of asexual reproduction. They are also known to use conjugation – which is often seen as the prokaryotic equivalent to sexual reproduction (however, it is NOT sexual reproduction).

Eukaryotic Cells

Main article : Eukaryotic Cells

• Eukaryotic cells are characterised by a true nucleus.
• The size of the cells ranges between 10–100 µm in diameter.
• This broad category involves plants, fungi, protozoans, and animals.
• The plasma membrane is responsible for monitoring the transport of nutrients and electrolytes in and out of the cells. It is also responsible for cell to cell communication.
• They reproduce sexually as well as asexually.
• There are some contrasting features between plant and animal cells. For eg., the plant cell contains chloroplast, central vacuoles, and other plastids, whereas the animal cells do not.

The cell structure comprises individual components with specific functions essential to carry out life’s processes. These components include- cell wall, cell membrane, cytoplasm, nucleus, and cell organelles. Read on to explore more insights on cell structure and function.

Cell Membrane

• The cell membrane supports and protects the cell. It controls the movement of substances in and out of the cells. It separates the cell from the external environment. The cell membrane is present in all the cells.
• The cell membrane is the outer covering of a cell within which all other organelles, such as the cytoplasm and nucleus, are enclosed. It is also referred to as the plasma membrane.
• By structure, it is a porous membrane (with pores) which permits the movement of selective substances in and out of the cell.  Besides this, the cell membrane also protects the cellular component from damage and leakage.
• It forms the wall-like structure between two cells as well as between the cell and its surroundings.
• Plants are immobile, so their cell structures are well-adapted to protect them from external factors. The cell wall helps to reinforce this function.
• The cell wall is the most prominent part of the plant’s cell structure. It is made up of cellulose, hemicellulose and pectin.
• The cell wall is present exclusively in plant cells. It protects the plasma membrane and other cellular components. The cell wall is also the outermost layer of plant cells.
• It is a rigid and stiff structure surrounding the cell membrane.
• It provides shape and support to the cells and protects them from mechanical shocks and injuries.
• The cytoplasm is a thick, clear, jelly-like substance present inside the cell membrane.
• Most of the chemical reactions within a cell take place in this cytoplasm.
• The cell organelles such as endoplasmic reticulum, vacuoles, mitochondria, ribosomes, are suspended in this cytoplasm.
• The nucleus contains the hereditary material of the cell, the DNA.
• It sends signals to the cells to grow, mature, divide and die.
• The nucleus is surrounded by the nuclear envelope that separates the DNA from the rest of the cell.
• The nucleus protects the DNA  and is an integral component of a plant’s cell structure.

Cell Organelles

Cells are composed of various cell organelles that perform certain specific functions to carry out life’s processes. The different cell organelles, along with its principal functions, are as follows:

Cell Theory was proposed by the German scientists,  Theodor Schwann, Matthias Schleiden, and Rudolf Virchow. The cell theory states that:

• All living species on Earth are composed of cells.
• A cell is the basic unit of life.
• All cells arise from pre-existing cells.

A modern version of the cell theory was eventually formulated, and it contains the following postulates:

• Energy flows within the cells.
• Genetic information is passed on from one cell to the other.
• The chemical composition of all the cells is the same.

Functions of Cell

A cell performs major functions essential for the growth and development of an organism. Important functions of cell are as follows:

Provides Support and Structure

All the organisms are made up of cells. They form the structural basis of all the organisms. The cell wall and the cell membrane are the main components that function to provide support and structure to the organism. For eg., the skin is made up of a large number of cells. Xylem present in the vascular plants is made of cells that provide structural support to the plants.

Facilitate Growth Mitosis

In the process of mitosis, the parent cell divides into the daughter cells. Thus, the cells multiply and facilitate the growth in an organism.

Allows Transport of Substances

Various nutrients are imported by the cells to carry out various chemical processes going on inside the cells. The waste produced by the chemical processes is eliminated from the cells by active and passive transport. Small molecules such as oxygen, carbon dioxide, and ethanol diffuse across the cell membrane along the concentration gradient. This is known as passive transport. The larger molecules diffuse across the cell membrane through active transport where the cells require a lot of energy to transport the substances.

Energy Production

Cells require energy to carry out various chemical processes. This energy is produced by the cells through a process called   photosynthesis in plants and respiration in animals.

Aids in Reproduction

A cell aids in reproduction through the processes called mitosis and meiosis. Mitosis is termed as the asexual reproduction where the parent cell divides to form daughter cells. Meiosis causes the daughter cells to be genetically different from the parent cells.

Thus, we can understand why cells are known as the structural and functional unit of life. This is because they are responsible for providing structure to the organisms and perform several functions necessary for carrying out life’s processes.

Also Read:  Difference Between Plant Cell and Animal Cell

To know more about what is a cell, its definition, cell structure, types of cells, the discovery of cells, functions of cells or any other related topics, explore  BYJU’S Biology . Alternatively, download BYJU’S app for a personalised learning experience.

Frequently Asked Questions

1. what is a cell, 2. state the characteristics of cells..

• Cells provide the necessary structural support to an organism.
• The genetic information necessary for reproduction is present within the nucleus.
• Structurally, the cell has cell organelles which are suspended in the cytoplasm.
• Mitochondria is the organelle responsible for fulfilling the cell’s energy requirements.
• Lysosomes digest metabolic wastes and foreign particles in the cell.
• Endoplasmic reticulum synthesises selective molecules and processes them, eventually directing them to their appropriate locations.

3. Highlight the cell structure and its components.

The cell structure comprises several individual components which perform specific functions essential to carry out life processes. The components of the cell are as follows:

• Cell membrane
• Nuclear membrane
• Endoplasmic reticulum
• Golgi Bodies
• Mitochondria
• Chloroplast

4. State the types of cells.

Cells are primarily classified into two types, namely

• Prokaryotic cells
• Eukaryotic cells

5. Elaborate Cell Theory.

Cell Theory was proposed by  Matthias Schleiden, Theodor Schwann, and Rudolf Virchow, who were German scientists. The cell theory states that:

6. What is the function of mitochondria in the cells?

7. what are the functions of the cell.

The essential functions of the cell include:

• The cell provides support and structure to the body.
• It facilitates growth by mitosis.
• It helps in reproduction.
• Provides energy and allows the transport of substances.

8. What is the function of Golgi bodies?

9. who discovered the cell and how, 10. name the cell organelle that contains hydrolytic enzymes capable of breaking down organic matter., 11. which cellular structure regulates the entry and exit of molecules to and from the cell.

Register at BYJU’S for cell related Biology notes. Refer to these notes for reference.

Further Reading:  Cell Biology MCQs

Put your understanding of this concept to test by answering a few MCQs. Click ‘Start Quiz’ to begin!

Select the correct answer and click on the “Finish” button Check your score and answers at the end of the quiz

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Assignment Biography: Student Criteria and Rubric for Writing

Researching an Individual Aligned to Common Core Writing Standards

• Tips & Strategies
• An Introduction to Teaching
• Policies & Discipline
• Community Involvement
• School Administration
• Technology in the Classroom
• Teaching Adult Learners
• Issues In Education
• Teaching Resources
• Becoming A Teacher
• Assessments & Tests
• Elementary Education
• Secondary Education
• Special Education
• Homeschooling
• M.A., English, Western Connecticut State University
• B.S., Education, Southern Connecticut State University

The genre of  biography can also be categorized in the sub-genre of  narrative nonfiction/historical nonfiction. When a teacher assigns a biography as a writing assignment, the purpose is to have a student utilize multiple research tools to gather and to synthesize information that may be used as evidence in a written report about an individual. The evidence gained from research can include a person’s words, actions, journals, reactions, related books, interviews with friends, relatives, associates, and enemies. The historical context is equally important. Since there are people who have influenced every academic discipline, assigning a biography can be a cross-disciplinary or inter-disciplinary writing assignment. 

Middle and high school teachers should allow students to have a choice in selecting the subject for a biography. Providing student choice, particularly for students in grades 7-12, increases their engagement and their motivation especially if students select individuals they care about. Students would find it difficult to write about a person they do not like. Such an attitude compromises the process of researching and writing the biography.

According to by Judith L. Irvin, Julie Meltzer and Melinda S. Dukes in their book  Taking Action on Adolescent Literacy:

"As humans, we are motivated to engage when we are interested or have real purpose for doing so. So motivation to engage [students] is the first step on the road to improving literacy habits and skills" (Chapter 1).

Students should find at least three different sources (if possible) to make sure the biography is accurate. A good biography is well-balanced and objective. That means if there is disagreement between sources, the student can use the evidence to state that there is a conflict.  Students should know that a good biography is more than a timeline of events in a person's life.

The context of a person's life is important. Students should include information about the historical time period in which a subject lived and did her/his work. 

In addition, the student should have a purpose for researching another person's life. For example, the purpose for a student to research and write a biography can be in a response to the prompt:

"How does this writing this biography help me to understand the influence of this person on history, and quite possibly, this person's impact on me?"

The following standards-based criteria and scoring rubrics can be used to grade a student-selected biography. Both criteria and rubrics should be given to students before they begin their work. 

Criteria for a Student Biography aligned to Common Core State Standards

A General Outline for Biography Details

• Birthdate /Birthplace
• Death (if applicable).
• Family Members.
• Miscellaneous (religion, titles, etc).

Education/Influences

• Schooling.Training.
• Work Experiences.
• Contemporaries/Relationships.

Accomplishments/  Significance

• Evidence of major accomplishments.
• Evidence of minor accomplishments (if relevant).
• The analysis that supports why the individual was worthy of note in their field of expertise during his or her life.
• Analysis why this individual is worthy of note in their field of expertise today.

Quotes/Publications

• Statements made.
• Works published.

Biography Organization using the CCSS Anchor Writing Standards 

• Transitions are effective in assisting the reader to understand shifts.
• Ideas within each paragraph are fully developed.
• Each point is supported by evidence.
• All evidence is relevant.  
• Important terms are explained to the reader.
• Purpose of each paragraph (introduction, body paragraphs, conclusion) is clear.  
• Clear relationship between topic sentence(s) and paragraph(s) that came before is evident.

Grading Rubric: Holistic Standards with Letter Grade Conversions

(based on extended response Smarter Balanced Assessment writing rubric)

Score: 4 or Letter Grade: A

Student response is a thorough elaboration of the support/evidence on the topic (individual) including the effective use of source material. The response clearly and effectively develops ideas, using precise language:

• Comprehensive evidence (facts and details) from source materials are integrated.
• Relevant, and specific clear citations or attribution to source materials.
• Effective use of a variety of elaborative techniques.
• Vocabulary is clearly appropriate for the audience and purpose. 
• Effective, appropriate style enhances content.

Score: 3  Letter Grade: B

Student response is an adequate elaboration of the support/evidence in the biography that includes the use of source materials. The student response adequately develops ideas, employing a mix of precise and more general language:  

• Adequate evidence (facts and details) from the source materials is integrated and relevant, yet the evidence and explanation may be general.
• Adequate use of citations or attribution to the source material.  
• Adequate use of some elaborative techniques.
• Vocabulary is generally appropriate for the audience and purpose.
• The style is generally appropriate for the audience and purpose.

Score: 2 Letter Grade: C

Student response is uneven with a cursory elaboration of the support/evidence in the biography that includes the uneven or limited use of source material. The student response develops ideas unevenly, using simplistic language:

• Some evidence (facts and details) from the source materials may be weakly integrated, imprecise, repetitive, vague, and/or copied.
• Weak use of citations or attribution to source materials.
• Weak or uneven use of elaborative techniques.
• Development may consist primarily of source summaries.
• Vocabulary use is uneven or somewhat ineffective for the audience and purpose.
• Inconsistent or weak attempt to create the appropriate style.

Score: 1 Letter Grade: D

Student response provides a minimal elaboration of the support/evidence in the biography that includes little or no use of source material. The student response is vague, lacks clarity, or is confusing:

• Evidence (facts and details) from the source material is minimal, irrelevant, absent, incorrectly used. 
• Insufficient use of citations or attribution to the source material.
• Minimal, if any, use of elaborative techniques.
• Vocabulary is limited or ineffective for the audience and purpose.
• Little or no evidence of appropriate style.
• Insufficient or plagiarized (copied without credit) text.
• Off-topic. 
• Off-purpose.
• Pros and Cons to Flexible Grouping in Middle and High School
• Grading for Proficiency in the World of 4.0 GPAs
• What Is an Annotated Bibliography?
• How to Write an Interesting Biography
• T.E.S.T. Season for Grades 7-12
• Topics for a Lesson Plan Template
• The Whys and How-tos for Group Writing in All Content Areas
• How to Create a Rubric in 6 Steps
• Definition and Examples of Analysis in Composition
• Beef Up Critical Thinking and Writing Skills: Comparison Essays
• What Is Plagiarism?
• 10 Test Question Terms and What They Ask Students to Do
• Higher Level Thinking: Synthesis in Bloom's Taxonomy
• What Is a Rubric?
• Writing Prompt (Composition)
• Rubrics - Quick Guide for all Content Areas

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Green Chemistry

Beyond 2,5-furandicarboxylic acid: status quo, environmental assessment, and blind spots of furanic monomers for bio-based polymers.

Since 5-(hydroxymethyl)furfural (HMF) has been labelled as the “sleeping giant” of the bio-based platform-chemical realm, numerous investigations have been devoted to the exploitation of this versatile molecule and its endless chemical transformations into novel monomers for producing bio-based polymers. However, beyond 2,5-furandicarboxylic acid (2,5-FDCA), little attention has been devoted to key aspects that deserve being addressed before bringing forward other HMF-derivatives into the bio-based plastic market, i.e., procedures, scaling-up of the syntheses, products’ purification, physical-thermal properties, and above all green metrics (sustainability/greenness of procedures). This critical review focuses on the most investigated derivatives of HMF beyond 2,5-FDCA, assessing their exploitation as monomers for bio-based polymers. HMF-derived compounds have been classified according to their functionalities, i.e., aldehyde-, diol-, polyol-, amine-, acid-, ester-,carbonate-, acrylate-, and epoxy-based monomers. The related synthetic approaches are discussed, evaluating the sustainability of the procedures reported so far, based on green metrics such as the environmental factor (E-factor) and the process mass intensity (PMI). For each family of HMF derivatives, their use as monomers for the synthesis of bio-based polymers has been addressed, taking into consideration the efficiency of the polymerisation reactions, the physical-chemical and thermal properties of the resulting bio-based polymers, as well as their biodegradability if applicable. The overall picture that emerges is that much has been achieved for the synthesis of furan monomers; however, many obstacles still need to be overcome prior to massively introducing these compounds into the bio-based plastic market. Hopefully, the data reported in this review will shed light on the goals achieved so far, and on some critical issues that must still be tackled in the short- or medium-term for a more sustainable and however efficient industrial process.

• This article is part of the themed collection: 2024 Green Chemistry Reviews

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M. Annatelli, J. Sánchez Velandia, G. Mazzi, S. V. Pandeirada, D. A. Giannakoudakis, S. Rautiainen, A. Esposito, S. Thiyagarajan, A. Richel, K. S. Triantafyllidis, T. Robert, N. Guigo, A. F. Sousa, E. Garcia-Verdugo and F. Aricò, Green Chem. , 2024, Accepted Manuscript , DOI: 10.1039/D4GC00784K

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‘Where’s Cricket?’ Don’t Ask. Kristi Noem Defends Killing Her Dog.

In a forthcoming book, the South Dakota governor, seen as a potential vice-presidential pick, tells of shooting her hunting dog. And a goat.

By Anjali Huynh

• April 26, 2024

Gov. Kristi Noem of South Dakota on Friday defended a story included in her forthcoming biography in which she describes killing a family dog on their farm, to her daughter’s distress — a grisly anecdote that instantly drew criticism from a number of political opponents.

Ms. Noem, a Republican who is widely seen as a contender to be former President Donald J. Trump’s running mate, shared details about shooting the 14-month-old dog, a female wirehaired pointer named Cricket, and an unnamed goat, according to excerpts first reported by The Guardian .

An avid hunter, Ms. Noem wrote that she had hoped to train Cricket to hunt pheasant, but that she proved “untrainable,” “dangerous to anyone she came in contact with” and “less than worthless” as a hunting dog. “I hated that dog,” Ms. Noem wrote, according to The Guardian.

It was after Cricket ruined a hunting trip, killed another family’s chickens and bit the governor that Ms. Noem recalled deciding to kill the dog; she shot Cricket in a gravel pit.

That was not the only blood Ms. Noem drew that day: She also shot a male goat that she called “nasty and mean.” Shot him twice, in fact: The goat jumped as she shot him the first time, according to The Guardian’s recounting of the book, so she fetched another shell and shot him again.

The whole ordeal was reportedly witnessed by a construction crew nearby. Ms. Noem wrote that as the workers returned to their jobs, a school bus came by to drop off her children.

Her daughter, Kennedy, Ms. Noem wrote, “looked around confused” and asked, “Hey, where’s Cricket?”

“I guess if I were a better politician, I wouldn’t tell the story here,” Ms. Noem wrote in the book, set to be published by Center Street on May 7. But she framed the day’s events as reflecting her willingness to do anything “difficult, messy and ugly,” whether that be in farm ownership or in politics.

The story drew condemnation on Friday from a swath of the political world, mainly to Ms. Noem’s left, including some anti-Trump Republicans and a number of Democrats. President Biden’s re-election campaign wrote on X that “Trump VP contender Kristi Noem brags about shooting her 14-month-old puppy to death.” And the Democratic National Committee issued a statement describing the passages as “disturbing and horrifying.”

Ms. Noem seized on The Guardian’s article to underscore her rural-America bona fides, promote her book and mock the news media. “We love animals, but tough decisions like this happen all the time on a farm,” she wrote Friday on X , adding that her family recently had to “put down” three horses.

She added that her book would contain “more real, honest, and politically INcorrect stories that’ll have the media gasping.”

Ms. Noem, who appeared with Mr. Trump at an event in Ohio last month, is one of several Republicans regularly mentioned as potential vice-presidential picks . At the Conservative Political Action Conference in February , she tied with Vivek Ramaswamy for first place in a poll of whom attendees wanted to see Mr. Trump select as a running mate.

She has routinely praised the former president and recently took part in an ad promoting her cosmetic dental work that some saw as a move to catch Mr. Trump’s attention , even as it drew legal scrutiny . In recent days, she has refused to say whether she would have certified the 2020 election on Jan. 6, 2021, and dodged questions on whether she supported exceptions to abortion bans in cases of rape or incest.

Anjali Huynh , a member of the 2023-24 Times Fellowship class based in New York, covers national politics, the 2024 presidential campaign and other elections. More about Anjali Huynh

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