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Science 5005 Practice Test 2

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Question 1 of 20

1. Question

Which of the following structures is the smallest unit of life?

Tissue
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Cell
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Organ
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Species
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Question 2 of 20

2. Question

In human beings, what is the function of the lymphatic system?

To circulate blood
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To maintain fluid levels
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To regulate body temperature
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To absorb vital nutrients
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Question 3 of 20

3. Question

In which of the following cell structures exists the molecular basis for heredity?

Nucleus
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Golgi apparatus
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Mitochondria
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Endoplasmic reticulum
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Question 4 of 20

4. Question

Which of the following scientists discovered the rules governing biological inheritance?

James Watson
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Francis Crick
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Gregor Mendel
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Rosalind Franklin
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Question 5 of 20

5. Question

Which of the following is the result of a mistake occurring in cell division?

Mutation
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Adaptation
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Homeostasis
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Apoptosis
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Question 6 of 20

6. Question

Which of the following scientists proposed the theory of evolution by natural selection?

Motoo Kimura
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Stephen Gould
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Charles Darwin
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Richard Dawkins
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Question 7 of 20

7. Question

Which of the following is an example of a human maintaining homeostasis?

The body can resist sleep well past its normal bedtime.
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Body temperature does not drop in a very cold room.
Correct Incorrect Correct answer

The eyes dilate to gather more light in a dark area.
Correct Incorrect Correct answer

Brain waves continue activity during REM sleep.
Correct Incorrect Correct answer

Correct

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Question 8 of 20

8. Question

Which of the following actions is an example of a reflex?

Typing on a keyboard without thinking
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Pulling your hand off a hot stove
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Judging a height before jumping
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Scanning the room for possible threats
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Question 9 of 20

9. Question

Which of the following traits makes prokaryotes a different branch of life than eukaryotes?

Prokaryotes lack a nucleus.
Correct Incorrect Correct answer

Prokaryotes lack a cell wall.
Correct Incorrect Correct answer

Prokaryotes have more chromosomes.
Correct Incorrect Correct answer

Prokaryotes have more mutations.
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Correct

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Question 10 of 20

10. Question

Which of the following traits demonstrates the unity of all life on Earth?

Breathing oxygen
Correct Incorrect Correct answer

Possessing DNA
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Reproducing sexually
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Using organelles
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Question 11 of 20

11. Question

A canopy is an important part of which of the following ecosystems?

Desert
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Grassland
Correct Incorrect Correct answer

Tundra
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Forest
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Question 12 of 20

12. Question

Which of the following is an example of biological interdependence?

Bees gathering pollen from plants
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Vultures eating a dead animal
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A bear catching salmon in a river
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A cheetah stalking a zebra
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Question 13 of 20

13. Question

Which of the following is an example of a communicable disease in human beings?

Down syndrome
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Leukemia
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Syphilis
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Skin cancer
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Question 14 of 20

14. Question

Carbohydrates are a complex form of which of the following compounds?

Proteins
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Sugars
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Lipids
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Minerals
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Question 15 of 20

15. Question

Since the Enlightenment, which of the following activities has taught scientists the most about how the human body works?

Autopsies
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Research studies
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Interviews
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Scientific papers
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Question 16 of 20

16. Question

Which of the following life scientists studies insects?

Microbiologist
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Ecologist
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Entomologist
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Mycologist
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Correct

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Question 17 of 20

17. Question

Which of the following is an advantage of studying life in the wild instead of a laboratory setting?

A laboratory lacks the tools researchers need to make observations.
Correct Incorrect Correct answer

Studying life in the wild may produce unexpected discoveries.
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The wild has more species for researchers to study.
Correct Incorrect Correct answer

A laboratory cannot produce all the variables present in the wild.
Correct Incorrect Correct answer

Correct

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Question 18 of 20

18. Question

A scientist is performing an experiment to see which new brand of bird food a parakeet prefers. Which of the following parts of the experiment is the control?

The parakeet’s specific species
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The parakeet’s normal bird food
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The amount of food the parakeet receives
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The size of the parakeet
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Correct

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Question 19 of 20

19. Question

For which of the following purposes would a life scientist use a Punnett square?

To test genetic samples
Correct Incorrect Correct answer

To project DNA sequences
Correct Incorrect Correct answer

To predict genetic inheritance
Correct Incorrect Correct answer

To develop gene splicing techniques
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Question 20 of 20

20. Question

Which of the following taxonomic ranks do all animals fall under?

Species
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Genus
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Order
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Kingdom
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Correct

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