What stops once menopause happens?
Options:
- (A) Menial tasks stop
- (B) Plant growth is reduced
- (C) Pulse stops
- (D) Dehydration
- (E) Breathing stops
- (F) Menstruation stops
- (G) smoking tobacco
- (H) recovery time from fatigue
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Let's think first: Menopause occurs when menstruation stops occurring, usually in middle adulthood. By definition, menopause occurs when menstruation stops permanently. Usually in middle adulthood menopause happens when menstruation stops permanently.... So the answer is [(F)]

What can mutations cause?
Options:
- (A) death and devastation
- (B) blood
- (C) massive damage
- (D) Leptospirosis
- (E) biological diversity
- (F) horses
- (G) ice
- (H) out of control growth
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Let's think first: Cancer cells divide more often than normal cells, and grow out of control. Cancer is an example of a mutation in cells. Mutation can cause growth out of control.... So the answer is [(H)]

What happens before the rigid structure that surrounds the plant cell dilates?
Options:
- (A) It decreases
- (B) competition
- (C) air cools
- (D) relaxation
- (E) cracking
- (F) sweating
- (G) rapid expansion
- (H) It expands
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Let's think first: Dilation occurs when cell walls relax. Cell wall is the rigid structure that surrounds the plant cell. Dilation occurs when the rigid structure that surrounds the plant cell relaxes.... So the answer is [(D)]

What do animals use for energy storage?
Options:
- (A) photosynthesis
- (B) sweating
- (C) vitamin C
- (D) batteries
- (E) methane
- (F) glucose
- (G) sugar
- (H) lipids
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Let's think first: Organisms use lipids to store energy. Plants and animals are organisms. Animals use lipids to store energy.... So the answer is [(H)]

What lacks respiratory and excretory systems?
Options:
- (A) the Sun
- (B) insects
- (C) starfish
- (D) barnacles
- (E) ferns
- (F) water
- (G) Conifers
- (H) humans
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Let's think first: Echinoderms lack respiratory and excretory systems. Echinoderms are represented by the starfish. Starfish lack respiratory and excretory systems.... So the answer is [(C)]

Brain tumors occur when what is no longer regulated?
Options:
- (A) fossil fuels
- (B) headaches
- (C) voltage
- (D) heat or cold
- (E) cell cycles
- (F) critical organs
- (G) cerebellum
- (H) migraines
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Let's think first: Cancer is a disease that occurs when the cell cycle is no longer regulated. Brain tumors are one of the fastest growing cancers today. Brain tumors occur when the cell cycle is no longer regulated.... So the answer is [(E)]