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Science 7005 Practice Test 2

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Science 7005 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.
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The eyes dilate to gather more light in a dark area.
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Brain waves continue activity during REM sleep.
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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.
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Prokaryotes lack a cell wall.
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Prokaryotes have more chromosomes.
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Prokaryotes have more mutations.
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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
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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
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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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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.
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Studying life in the wild may produce unexpected discoveries.
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The wild has more species for researchers to study.
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A laboratory cannot produce all the variables present in the wild.
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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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Question 19 of 20

19. Question

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

To test genetic samples
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To project DNA sequences
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To predict genetic inheritance
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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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