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  - Nuclear Chemistry
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  - Polymer Chemistry
    - Polymerization 5
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    - Electronic Structure 100
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    - Spectroscopy Theory 5
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  - Green Chemistry
    - Sustainable Design 4
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  - Materials Chemistry
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- Biology
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    - Cell Division 32
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  - Genetics
    - DNA Structure 5
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    - Genetic Disorders 7
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  - Evolution
    - Origin of Life 9
    - Theories of Evolution 5
    - Natural Selection 6
    - Variation 5
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    - Speciation 5
    - Fossil Record 5
    - Comparative Anatomy 12
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    - Human Evolution 5
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  - Ecology
    - Ecosystem 36
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    - Food Chains 16
    - Food Webs 5
    - Ecological Energy Flow 5
    - Nutrient Cycles 13
    - Biodiversity 28
    - Ecological Conservation 47
    - Habitat 5
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  - Human Anatomy & Physiology
    - Skeletal System 116
    - Muscular System 69
    - Nervous System 124
    - Endocrine System 78
    - Circulatory System 90
    - Respiratory System 44
    - Digestive System 46
    - Excretory System 10
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    - Immune System 11
    - Integumentary System 21
    - Sensory Organs 56
  - Botany Plant Biology
    - Plant Anatomy 38
    - Plant Morphology 5
    - Plant Physiology 69
    - Photosynthesis 53
    - Plant Reproduction 22
    - Plant Growth 5
    - Plant Hormones 5
    - Plant Taxonomy 43
    - Plant Ecology 19
    - Plant Pathology 6
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    - Plant Genetics 6
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  - Zoology Animal Biology
    - Classification 38
    - Porifera 6
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    - Platyhelminthes 5
    - Nematoda 6
    - Annelida 7
    - Arthropoda 12
    - Mollusca 5
    - Echinodermata 6
    - Chordata 5
    - Fish 76
    - Amphibians 10
    - Reptiles 14
    - Birds 5
    - Mammals 106
    - Anatomy 16
    - Physiology 32
    - Reproduction 26
    - Development 6
    - Behavior 63
  - Microbiology
    - Microbial Structure 5
    - Bacteriology 33
    - Virology 34
    - Mycology 16
    - Parasitology 59
    - Microbial Genetics 5
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  - Biotechnology
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    - Bioinformatics 6
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  - Molecular Biology
    - Biological Biomolecules 8
    - Carbohydrates 6
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    - Bio Proteins 5
    - Bio Enzymes 21
    - Bio Nucleic Acids 5
    - Biochemical Vitamins 5
    - Bio Minerals 6
    - Bio Metabolism 60
    - Cellular Respiration 22
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  - Immunology
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  - Developmental Biology
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- Earth & Space Science
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12th Grade Biology Quizzes, Questions & Answers

Recent Biology Quizzes

Gld Ch. 10 T2(Blood)

Questions: 48 | Attempts: 193 | Last updated: Feb 2, 2025

Sample Question
1. Which of the following would result from a reduced number of erythrocytes in the blood?

Increased hemoglobin in the blood

Decreased hematocrit

Increased risk of hemostasis

Decreased osmotic pressure of the blood

Histology Lab Exam! Toughest Trivia Quiz

Questions: 20 | Attempts: 8288 | Last updated: Oct 18, 2025

Sample Question
What is the Type Of This Tissue?

Reticular Connective Tissue

Peripheral Nerve Fiber

Dense Irregular Connective Tissue

Simple Squamous Epithelium

Lecture 1 and 2 Fill-in-the-blanks

Questions: 60 | Attempts: 132 | Last updated: Mar 14, 2025

Test Your Life Science Knowledge!

Questions: 10 | Attempts: 1304 | Last updated: Mar 21, 2025

Sample Question
In what year is OriGene Technologies founded as a research tool company?

1994

1995

1996

1999

2001

Biology 1 Midterm Exam Review A

Questions: 25 | Attempts: 2091 | Last updated: Aug 22, 2025

Sample Question
Scientists use observations and data to form and test ___.

Constants

Hypotheses

Theories

Conclusions

Positive and Negative Feedback Loop Quiz

Questions: 5 | Attempts: 9640 | Last updated: Mar 22, 2025

Sample Question
If blood glucose levels fall below normal levels (for instance, during the post-absorptive or fasting state, when nutrients from a recently digested meal are no longer circulating in the blood, or during starvation), insulin secretion is inhibited and, at the same time, the alpha cells of the pancreas respond by secreting glucagon, a hormone that has several important effects: (1) it accelerates the breakdown of glycogen to glucose in liver and skeletal muscle cells; (2) it increases the breakdown of fats to fatty acids and glycerol in adipose tissue and, consequently, the release of these substances into the blood (which cells can thus use for energy); and (3) it stimulates liver cells to increase glucose synthesis (from glycerol absorbed from the blood) and glucose release into the blood. These effects collectively cause an increase in blood glucose levels back to normal levels.

This is a positive feedback loop

This is a negative feedback loop

This is not a feedback loop

A Review Quiz On Biology!

Questions: 15 | Attempts: 287 | Last updated: Mar 17, 2025

Sample Question
According to this image, as light intensity increases, the rate of photosynthesis...

Increases

Decreases

Is not affected

Not answered by this graph

AP Biology Exam: Trivia Questions On Introduction To Biology! Quiz

Questions: 44 | Attempts: 193 | Last updated: Mar 21, 2025

Sample Question
____ is the unifying concept of biology.

Life

Growth

Genetics

Evolution

Nervous System Exam: Biology Quiz!

Questions: 17 | Attempts: 147 | Last updated: Mar 20, 2025

Sample Question
Part of a neuron include:

The axon

The cell body

Dendrites

All of the above

High School Assessment: Hardest Biology Test! Trivia Quiz

Questions: 179 | Attempts: 554 | Last updated: Mar 21, 2025

Sample Question
Use the information and the chart below to answer the following item.Several students are conducting an experiment to test the effect of exercise on heart rate. Students do 20 sit-ups in one minute of exercise. The data chart below shows the heart rate at one-minute intervals for each student.Each time the students did the experiment they got different results. They decided to ignore any results that were too far above or below their original prediction. They repeat these trials until a value closer to their prediction is obtained.The students’ decision to ignore data and repeat trials affects the experiment by- [1.1.4 A2]

Introducing bias

Decreasing controls

Increasing accuracy

Eliminating variables

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