Macroevolution most likely occurs over what period of time?
Options:
- (A) Summer
- (B) length
- (C) eons
- (D) long
- (E) growth
- (F) Earth
- (G) years
- (H) scale
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Let's think first: Macroevolution occurs over geologic time above the level of the species. All geologic time can be divided into two eons. Macroevolution occurs over eons.... So the answer is [(C)]

What infects and destroys helper t cells?
Options:
- (A) swea
- (B) Wasps
- (C) AIDS
- (D) CO 2
- (E) PDAs
- (F) humans
- (G) heat
- (H) anemia
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Let's think first: HIV infects and destroys helper T cells. Scientists agree that HIV causes Aids. AIDS infects and destroys helper T cells.... So the answer is [(C)]

What produces both eggs and sperm?
Options:
- (A) Plant reproduction
- (B) sub-units of species
- (C) gastropod shells
- (D) an individual mature sponge
- (E) Microscopic organisms
- (F) members of their own species
- (G) peachleaf willow
- (H) seed dispersal
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Let's think first: Adult sponges produce eggs and sperm. An adult is mature, fully developed. Mature sponges produce eggs and sperm.... So the answer is [(D)]

Arteries in the body are able to carry what?
Options:
- (A) saliva
- (B) breathe
- (C) water
- (D) Air
- (E) oxygen
- (F) blood
- (G) veins
- (H) liquid
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Let's think first: Veins generally carry deoxygenated blood. Arteries and veins are blood vessels. Arteries carry blood.... So the answer is [(F)]

Where in the plant does growth in width or girth originate?
Options:
- (A) conductive tissue
- (B) carbon dioxide
- (C) Veins and arteries.
- (D) It gets more light
- (E) photosynthesis
- (F) at or near the margins
- (G) vascular tissue
- (H) in the autumn season
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Let's think first: Secondary meristem is located within and around the vascular tissues. Growth in girth is caused by other meristems, called secondary meristems. Plant growth in width or girth emanates from within and around the vascular tissues.... So the answer is [(G)]

Where do fungi get their food?
Options:
- (A) swamp vegetation
- (B) decomposing dead organisms
- (C) decomposition
- (D) the environment
- (E) mushrooms
- (F) By wind and rain
- (G) spores
- (H) carbon dioxide
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Let's think first: Fungi lack chlorophyll, so they cannot make food by photosynthesis as plants can. Fungi decompose dead plant and animal matter. Since fungi cannot make food by photosynthesis, they decompose dead organisms.... So the answer is [(B)]