Cells pretty much al share this one characteristic:
Options:
- (A) sensory neurons
- (B) voltage
- (C) aerobic capacity
- (D) microscopic
- (E) eukaryotic
- (F) bacteria
- (G) prokaryotic
- (H) layers of fat
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Let's think first: Cells vary in size as well as shape, but all cells are very small. All cells are microscopic in size. Cells can vary in shape, but they are all microscopic.... So the answer is [(D)]


What wets the skin, and when it evaporates, it cools the body?
Options:
- (A) Heat energy
- (B) salt and water
- (C) acetic acid
- (D) urine
- (E) ice
- (F) Chlorophyll
- (G) white vinegar
- (H) blood
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Let's think first: Sweat wets the skin, and when it evaporates, it cools the body. Sweat is made of salt and water. Water and salt wets the skin, and when it evaporates, it cools the body.... So the answer is [(B)]


What do animals use as a food course?
Options:
- (A) it keeps an organism warm
- (B) water
- (C) Generating heat
- (D) Organic compounds
- (E) deadwood
- (F) light energy
- (G) other living things
- (H) inorganic
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Let's think first: Heterotrophs get food by eating other living things. Animals are heterotrophs, or other-feeders. Animals get food by eating other living things.... So the answer is [(G)]


Where can amphibians that move like earthworms be found?
Options:
- (A) moist bodies
- (B) body water
- (C) storing water
- (D) during the day
- (E) four limbs
- (F) moist soil
- (G) dry areas
- (H) high altitudes
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Let's think first: Caecilians can be found in moist soil near rivers and streams in tropical regions. Caecilians are amphibians that move just like earthworms. Amphibians that move like earthworms can be found in moist soil near rivers and streams in tropical regions.... So the answer is [(F)]


The next generation of an organism rises via:
Options:
- (A) Plants growth
- (B) spontaneous generation
- (C) reproduction
- (D) The Sun
- (E) revolution
- (F) sun's heat
- (G) heat energy
- (H) unions
--
Let's think first: Reproduction is the process by which organisms give rise to offspring. Then, the lowest energy offspring are used as parents for the next generation. Reproduction is the process by which organisms give rise to the next generation.... So the answer is [(C)]


Cells are programmed to _ only a set number of times.
Options:
- (A) migrate
- (B) expand
- (C) A computer
- (D) Most plants
- (E) allow growth
- (F) reproduce
- (G) contract
- (H) constrict
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Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Let's think first: Cells are programmed to divide only a set number of times. Cells reproduce asexually, by dividing. Cells are programmed to reproduce only a set number of times.... So the answer is [(F)]