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Online Biology Tutors Available Now

Keeping up in biology class is hard enough without the worksheets, chapter questions, and lab reports your teacher assigns as homework. When you factor that stuff in, bio can seem completely overwhelming—even for high school students or first-year undergrads.

Fortunately, our online biology tutors are available for homework help the minute you need it.

They're online 24/7 to help you with biology homework questions, science projects, or test prep. Best of all, you can get a tutor anytime you're stuck on something—from home or on the go.

Biology help on demand

Every biology tutoring session happens in our online classroom, where you can chat with your tutor, share files, and draw on an interactive whiteboard. It doesn't matter if you need help after school, before school, or at three o'clock in the morning before your next biology test—we're here for you all day, every day.

Any biology problem, anytime

Our online tutors cover biology up to the introductory college level, including AP ® Biology , so they can help you with anything your bio teacher assigns. Here are just a few things you can get done faster and easier with help from an online biology tutor:

• Biology labs and lab reports
• Bio worksheets and problem sets
• Biology homework assignments
• Single problems or entire chapters
• Preparing for biology tests
• Reviewing tough concepts from class

Get started tonight

Get help with tonight’s homework— find a biology tutor now .

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Biology Homework Help

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Biology , the study of life, can be fascinating and wondrous. However, certain biology topics can sometimes seem incomprehensible. The best way to get a clear understanding of difficult biology concepts is to study them at home, as well as at school. Students should use quality biology homework help resources when studying. Below are some good resources and information to help you answer some of your biology homework questions.

Key Takeaways

• Biology homework and assignments can be difficult to understand. Always make sure to avail yourself of all available resources so that you can succeed.
• Your instructor, fellow students, and tutors can be invaluable to help make sure that you get clarification on concepts that you don't understand.
• Understanding key biological concepts like cell processes, DNA, and genetics are helpful in understanding some of the foundations of biology.
• Use sample biology quizzes and online resources to test your grasp of biology concepts.

Biology Homework Help Resources

Anatomy of the Heart Learn about this amazing organ that supplies blood to the entire body.

Animal Tissues Information on the structure and function of animal tissue types.

Bio-Word Dissections Learn how to "dissect" difficult biology words  so that they are easy to understand.

Brain Basics The brain is one of the largest and most important organs of the human body. Weighing in at about three pounds, this organ has a wide range of responsibilities.

Characteristics of Life What are the basic characteristics of life?

How To Study for Biology Exams

Biology exams can seem intimidating and overwhelming. The key to overcoming these obstacles is preparation. Learn how to do well on your biology test.

Organ Systems The human body is made up of several  organ systems  that work together as one unit. Learn about these systems and how they work together.

The Magic of Photosynthesis Photosynthesis is a process in which light energy is used to produce sugar and other organic compounds.

Eukaryotic and Prokaryotic Cells Take a journey into the cell to find out about the cell structure and classification of both prokaryotic cells and eukaryotic cells.

Cellular Respiration Cellular respiration is the process by which cells harvest the energy stored in food.

Differences Between Plant and Animal Cells Plant and animal cells are similar in that both are eukaryotic cells. However, there are several important differences between these two cell types.

Prokaryotic Cells Prokaryotes are single-celled organisms that are the earliest and most primitive forms of life on earth. Prokaryotes include bacteria and archaeans.

10 Different Types of Cells in the Human Body

The body contains trillions of cells that come in varying shapes and sizes. Explore some of the different types of cells in the body.

7 Differences Between Mitosis and Meiosis Cells divide either through the process of mitosis or meiosis. Sex cells are produced through meiosis, while all other body cell types are produced through mitosis.

DNA Processes

Steps of DNA Replication DNA replication is the process of copying the DNA within our cells. This process involves RNA and several enzymes, including DNA polymerase and primase.

How Does DNA Transcription Work? DNA transcription is a process that involves the transcribing of genetic information from DNA to RNA. Genes are transcribed in order to produce proteins.

Translation and Protein Synthesis Protein synthesis is accomplished through a process called translation. In translation, RNA and ribosomes work together to produce proteins.

Genetics Guide Genetics is the study of inheritance or heredity. This guide helps you to understand basic genetics principles.

Why We Look Like Our Parents Have you ever wondered why you have the same eye color as your parent? Traits are inherited by the transmission of genes from parents to their young.

What Is Polygenic Inheritance? Polygenic inheritance is the inheritance of traits such as skin color, eye color and hair color, that are determined by more than one gene.

How Gene Mutation Occurs A gene mutation is any change that occurs in the DNA . These changes can be beneficial to, have some effect on, or be seriously detrimental to an organism.

What Traits Are Determined by Your Sex Chromosomes? Sex-linked traits originate from genes found on sex chromosomes. Hemophilia is an example of a common sex-linked disorder that is an X-linked recessive trait.

Cellular Respiration Quiz Cellular respiration allows cells to harvest the energy in the foods we eat. Test your knowledge of cellular respiration by taking this quiz!

Genetics and Heredity Quiz Do you know the difference between codominance and incomplete dominance? Test your knowledge of genetics by taking the Genetics and Heredity Quiz!

How Much Do You Know About Mitosis? In mitosis, the nucleus from a cell is divided equally between two cells. Test your knowledge of mitosis and cell division by taking the Mitosis Quiz!

Getting Additional Help

The above information provides a basic foundation for various biology topics. If you find that you still have problems understanding the material, don't be afraid to request assistance from an instructor or tutor. They can help clarify concepts so that you can gain a deeper understanding of biological concepts.

• Genetics Basics
• 10 Great Biology Activities and Lessons
• Genes and Genetic Inheritance
• Cell Theory: A Core Principle of Biology
• Understanding the Genetic Code
• An Introduction to DNA Transcription
• Cell Biology Glossary
• How Chromosome Mutations Occur
• Chromosome Structure and Function
• DNA Definition: Shape, Replication, and Mutation
• Differences Between Plant and Animal Cells
• 10 Facts About Cells
• How To Make a DNA Model Using Candy
• Free or Low Cost Apps for Biology Teachers
• Science Class Question-and-Answer Topics
• Meiosis Study Guide

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Biology Worksheets, Notes, and Quizzes (PDF and PNG)

This is a collection of free biology worksheets, notes, handouts, slides, study guides and quizzes. Most content targets high school, AP biology, genetics, anatomy/physiology, immunology, and biology 101 and 102 in college. There is also biochemistry and physics for biologists. However, some resources are at the grade school and middle school level.

The files are PDF, PNG, JPG, and formats using Google Apps for Google Classroom. Most of the time, these formats are interchangeable. So, if you see something you like, but want a different format, just let us know. Print these resources, make transparencies and slides, etc.

In the interest of quick load time, not all of the images are shown. If you’d rather see them all, just contact us!

Biochemistry

[ Google apps worksheet ][ worksheet PDF ][ answers PDF ][ worksheet PNG ][ answers PNG ]

Enzymes Definitions

[ Google Slides worksheet ][ worksheet PDF ][ answers PDF ][ worksheet PNG ][ answers PNG ]

• 20 Amino Acids [ PNG ][ PDF ]
• Amino Acid Side Chains [ PNG ][ PDF ]
• Identifying Type of Biological Macromolecules [ Google Slides worksheet ][ worksheet PDF ][ answers PDF ][ worksheet PNG ][ answers PNG ]
• Disaccharide Examples [ PNG ]
• Products of Photosynthesis [ JPG ]
• Anabolism vs Catabolism [ PNG ]
• 3 Parts of a Nucleotide [ PNG ]
• Fermentation Definition and Examples [ PNG ]

General and Cell Biology

Organelles and Their Functions

Parts of a Plant Cell

Label Parts of a Chloroplast

[ Google Apps worksheet ][ worksheet PDF ][ answers PDF ][ worksheet PNG ][ answers PNG ]

Label Parts of a Mitochondria

Label the Animal Cell

[ Google Apps worksheet ][ worksheet PDF ][ worksheet PNG ][ answers PNG ]

Prokaryotes vs Eukaryotes Worksheet

Steps of the Cell Cycle

Steps of Mitosis

Membrane Transport Terms and Definitions

Membrane Transport Worksheet #2

The Plasma Membrane

Label a Bacterial Cell

• Label a Bacteriophage [ Google Apps worksheet ][ worksheet PDF ][ worksheet PNG ][ answers PNG ]
• Evidence of Evolution Worksheet [ Google Apps worksheet ][ Worksheet PDF ][ Worksheet PNG ][ Answers PNG ]
• Evolutionary Processes Worksheet [ worksheet Google Apps ][ worksheet PDF ][ worksheet PNG ][ answers PNG ]
• Major Receptor Families [ Google Apps worksheet ][ worksheet PDF ][ worksheet PNG ][ answers PNG ]
• Label a Bacterial Cell Membrane ( E. coli ) [ Google Apps worksheet ][ worksheet PDF ][ worksheet PNG ][ answers PNG ]

Anatomy and Physiology

These worksheets are only a portion of the available anatomy and physiology worksheets. Human anatomy and physiology worksheets have their own section.

Label the Heart

Label the Eye

[ Google Apps worksheet ][ worksheet PDF ][ answers PDF ][ worksheet PNG ]

Types of Blood Cells

[ worksheet Google Apps ][ worksheet PDF ][ worksheet PNG ][ answers PNG ]

Label the Muscles

[ worksheet PDF ][ worksheet PNG ][ answers PNG ]

Label the Ear

[ Google Apps worksheet ][ Worksheet PDF ][ Worksheet PNG ][ Answers PNG ]

Label the Lungs

Label the Kidney

Label the Liver

Label the Large Intestine

Label the Stomach

[ Google Apps worksheet ] [Worksheet PDF ][ Worksheet PNG ][ Answers PNG ]

External Nose Anatomy

[ Worksheet PDF ][ Worksheet Google Apps ][ Worksheet PNG ][ Answers PNG ]

Parts of the Nose

Label Bones of the Skeleton

Label the Lymph Node

Label the Parts of the Brain

Label the Lobes of the Brain

Brain Anatomical Sections

Arteries of the Brain

Label the Pancreas

Label the Spleen

Label the Digestive System

Label the Respiratory System

Parts of a Neuron

Label the Lips

Label the Skin

Label the Circulatory System

The Urinary Tract

[ Worksheet PDF ][ Worksheet Google Apps ][ Worksheet PNG ][ Answer Key PNG ]

The Bladder

• The Female Reproductive System [ worksheet PDF ][ worksheet Google Apps ][ worksheet PNG ][ answers PNG ]

Parts of a Flower

Label the Orchid Plant

[ Worksheet PDF ][ Worksheet Google Apps ][ Worksheet PNG ] [Answer Key PNG ]

Parts of an Orchid Flower

Parts of a Monocot Seed

Parts of a Fern

Parts of a Tree Trunk

Parts of a Tree

[ worksheet PDF ][ worksheet Google Apps ][ worksheet PNG ][ answers PNG ]

Parts of a Mushroom

Label the Shark

Label the Fish

Parts of a Bird

Bird Anatomy

Frog Life Cycle

Parts of a Mosquito (Insect)

Bones of the T. rex Skull

[ worksheets PDF ][ worksheet Google Slides ][ worksheet PNG ][ answers PNG ]

Holes of the T. rex Skull

• Label the T. rex Skeleton [ worksheets PDF ][ worksheet Google Slides ][ worksheet PNG ][ answers PNG ]
• Label Human Teeth [ Worksheet PDF ][ Worksheet Google Apps ][ Worksheet PNG ][ Answer Key PNG ]
• Monocot vs Dicot Seeds [ worksheet PDF ][ worksheet Google Slides ][ worksheet PNG ][ answers PNG ]
• Label the Moss [ worksheet PDF ][ worksheet Google Slides ][ worksheet PNG ][ answers PNG ]
• Diagram of the Human Eye [ JPG ]

Use a completed worksheet as a study guide.

Cells of the Immune System

Immune Cell Functions

[ worksheet Google Apps ][ worksheet PDF ][ worksheet PNG #1][ answers PNG #1][ worksheet PNG #2][ answers PNG #2]

Methods to Study Virus Structures

[ worksheet Google Slide ][ worksheet PDF ][ worksheet PNG ][ answers PNG ]

Icosahedral Virus Capsids

Human DNA Viruses

Human RNA Viruses

This is selection of worksheets relating to DNA, RNA, transcription, translation, genetic crosses, plasmid mapping, etc. See the full collection of genetics worksheets if you’re don’t see what you need.

DNA Replication

Types of Mutations

Monohybrid Cross Worksheet #1

Monohybrid Cross Worksheet #2

Monohybrid Cross Worksheet #3

Monohybrid Cross #4 – Multiple Alleles

• Monohybrid Cross Worksheet #5: Multiple Alleles [ worksheet Google Apps ][ worksheet PDF ][ worksheet PNG ][ answers PNG ]

Monohybrid Cross #6 – Sex-Linked Inheritance

Monohybrid Cross #7 – Sex-Linked Inheritance

Dihybrid Cross Worksheet #1

Dihybrid Cross Worksheet #2

Dihybrid Cross Worksheet #3

Dihybrid Cross Worksheet #4

Dihybrid Cross #5 – Epistasis

Dihybrid Cross #6 – Epistasis

Incomplete Dominance Worksheet #1

Incomplete Dominance Worksheet #2

Natural Selection Worksheet

Convergent vs Divergent Evolution Worksheet

Intro to Pedigrees Worksheet #1

Pedigrees/Genealogy Worksheet #2

Pedigrees/Genealogy Worksheet #3 – X-Linked Dominant Traits

Pedigrees/Genealogy Worksheet #4 – X-Linked Recessive Traits

Pedigrees/Genealogy Worksheet #5 – Autosomal Dominant Traits

Pedigrees/Genealogy Worksheet #6 – Autosomal Recessive Traits

Pedigrees/Genealogy Worksheet #7 – Comprehension Skills

Pedigrees/Genealogy Worksheet #8 – Identifying Inheritance Patterns

Autosomal vs Sex-Linked Inheritance

Plasmid Mapping

• Genotype vs Phenotype [ PNG ]
• Genetic Codon Chart [ PNG ][ PDF ]
• RNA vs DNA [ JPG ]

Use labelled diagrams as study guides.

Ecosystems Worksheet

Levels of Organization (Ecosystem)

Primary Succession

Secondary Succession

Label the Insect

Label the Bee

Chicken Life Cycle (Basic)

Bird Life Cycle (Basic)

Butterfly Life Cycle

• Biotic and Abiotic Factors [ worksheet PDF ][ worksheet Google Apps ][ worksheet PNG ][ answers PNG ]
• Kingdoms of Life Graphic [ PNG ]
• Autotroph vs Heterotroph Graphic [ PNG ]
• Commensalism Definition and Examples [ PNG ]
• Difference Between Butterflies and Moths [ JPG ]
• Difference Between Bugs and Insects [ PNG ]

Parasitology

Schistosome Life Cycle

Schistosome Anatomy

• Giardia Life Cycle [ worksheet Google Apps ][ worksheet PDF ][ worksheet PNG ][ answers PNG ]

Physical Science for Biology

There is also an entire section devoted to physical science worksheets and study guides.

• Adhesion vs Cohesion Graphic [ PNG ]
• What Is Entropy? [ PNG ]
• Freezing Point of Water [ PNG ]

Biology Labs

• How to Extract DNA From a Banana [ PNG ]

Biology Word Search Puzzles

• DNA Replication Word Search
• Gel Electrophoresis Word Search
• Citrus Fruits
• General Biology Word Search Puzzle [ PNG ]
• Life Science Word Search [ PNG ][ PDF ]
• Cell Biology Word Search [ PNG ][ PDF ]
• Amino Acid Word Search [ PNG ][ PDF ]
• Biome Word Search [ PNG ][ PDF ]
• Environmental Science Word Search [ PNG ][ PDF ]
• Photosynthesis Word Search [ PNG ]
• Human Skeleton Bones Word Search [ PNG ]
• Dinosaur Word Search [ PNG ][ PDF ]
• Different Dinosaur Word Search [ PNG ][ PDF ]
• Wild Cats Word Search [ PNG ][ PDF ]
• Shark Word Search [ PNG ]
• Trees Word Search [ PNG ][ PDF ]
• Flowers Word Search [ PNG ][ PDF ]
• Butterfly Word Search [ PNG ][ PDF ]
• Genetics Word Search [ PNG ][ PDF ]

Miscellaneous Biology Notes and Resouces

• How Long Can Germs Live on Surfaces? [ PNG ]
• 10 Radioactive Foods [ PNG ]
• Examples of Organic Compounds [ PNG ]

Biology Notes Terms of Use

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This page doesn’t include all of the assets on the Science Notes site. If there’s a table or worksheet you need but don’t see, just let us know.

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How do i enroll in a course at hippocampus, are there any fees to take your courses, how do i make a comment or ask a question, how do i get individual help with my homework assignment, how can i use hippocampus in my classroom, how can i use hippocampus in my home school, can i use the resources you have available for my homeschoolers, is there a script, app, or something that can be used to track student use of hippocampus, can i download the video, can i change the size of the video window, what if my page scroll bars or "submit" button are not showing, i can't find closed captioning. isn't this a violation of 504/508 of the federal rehabilitation act, where does the content from your site come from, there is an error in the multimedia presentation. can you fix it, how do i report a course errata item, why are there answer keys available to the students for the end-of-chapter tests, where are the answers to the review questions, the audio in some videos within the religion course is problematic. can you fix it, why aren't the lab sections in environmental science appearing, hippocampus and advanced placement (ap)*, how are homeschoolers using hippocampus for ap what about dante and clep, can schools order and administer ap exams without completing the ap course audit, are the courses at hippocampus ap approved.

We are a non-profit organization and provide the content at our websites for self-improvement only as part of our mission. You cannot get credit for it since we are not a school.

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HippoCampus is not a credit-granting organization, and does not monitor, grade, or give transcripts to anyone using the site. However, many home schooling families have used HippoCampus content to supplement or guide their home curriculum, and we welcome them as users. HippoCampus is made possible by the members of The NROC Project, and many NROC members offer credit for courses that contain HippoCampus content.

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We know a lot of homeschoolers use HippoCampus. We are often asked if homeschoolers can study the content at HippoCampus and then just take and pass the AP exam. HippoCampus courses were designed to address the AP College Board criteria. However, as with any teaching resource, they should not be considered a singular solution, but can be used as a good foundation for an AP teaching curriculum. The courses at HippoCampus have not currently been mapped to the CLEP and DANTE tests. If you wish to receive college credit for taking an AP course, most colleges will require that the courses have been approved by the College Board. Schools wishing to give their students AP credit must go through the AP audit process. The same is true for homeschoolers. The AP Course Ledger section below gives more information about the audit process. AP Course Ledger The AP Course Ledger is a comprehensive and public registry of all courses authorized to use the AP label on student transcripts. The Ledger is an annual and culminating product of the AP Course Audit, a process by which college faculty confirm that courses submitted by AP teachers and schools provide students with the essential elements of a college level experience. As an exclusively Web-based registry, the Ledger is published annually in November and updated weekly throughout the academic year to reflect newly authorized courses. Here is a link to AP Audit information, (and you can find other links on this page to various other resources): http://www.collegeboard.com/html/apcourseaudit/

Yes, the AP Course Audit is only required for schools desiring to: -- use the "AP" designation on students' transcripts -- be listed in the ledger of authorized AP courses provided each fall to college and university admissions offices and the public. Schools that simply offer the AP Exam as an opportunity for their students to earn college credit, without actually labeling the school's courses "AP" on students' transcripts, do not need to participate in the AP Course Audit, and can continue offering AP Exams to their students.

Our AP content is a good resource to help students prepare for AP exams. However, while we provide content resources, we do not have instructors who teach the courses. In order to be authorized by the College Board and put in the AP Course Ledger, an instructor must submit a syllabus for the course. While we do not have instructors who teach our courses, we do have NROC member schools that teach the courses for credit and they have been approved through the AP College Board. *AP, Advanced Placement and Advanced Placement Program are registered trademarks of the College Board, which was not involved in the production of, and does not endorse, this content.

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Biology serves as a foundation for a wide variety of fields, including physics , forensics, pharmaceuticals , science education and more . If you're using your education to pursue a career in one of these related fields, you'll need to fully dedicate yourself to your biology coursework to succeed. 

Making the most of your biology class and developing a strong fundamental knowledge is essential to succeed in future courses. Even if you're an advanced biology student, you probably still consult the internet with any questions that arise in your coursework. Having a go-to source for information or answers is an important part of developing a functional knowledge of every concept.

While some online resources are more reliable than others, it's crucial to your education and success in your college-level biology course that you find a trustworthy biology homework help source such as 24HourAnswers to ensure the information or assistance you get is accurate.

College Biology Homework Help

At 24HourAnswers, we offer an array of different online biology tutors , all of whom are advanced in their fields and highly qualified to instruct you. From straightforward biology homework help to answering detailed questions, our team of credible online tutors can improve your performance in your course and enhance your overall educational experience. 

Since we have tutors in all bio-related topics, we can provide a range of different services. Our online biology tutors will:

• Provide specific insight for biology homework assignments.
• Review broad conceptual ideas and chapters.
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With these capabilities, our online college biology tutors will give you the tools you need to gain a comprehensive knowledge of biology you can use in future courses.

24HourAnswers Online Biology Tutors

Our online biology tutors are just as dedicated to your success in class as you are, so they are available around the clock to assist you with questions, homework, exam preparation and any biology-related assignments you need extra help completing. 

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The AP Biology exam covers lots of topics. From anatomy and physiology, to biochemistry and ecology. Biology is such a broad subject, it can be a daunting task to prepare for the AP exam. But that’s what we’re here for. Whenever you’re feeling overwhelmed or unsure, sign on and connect to an AP Biology tutor that can help you solve the problem. You can keep up in class, and aim for a strong AP Bio score in May.

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