The transfer of pollen to what is the fertilization step of the sexual reproduction of a plant?
Options:
- (A) stigma
- (B) apples
- (C) flowers
- (D) embryos
- (E) potatoes
- (F) seeds
- (G) eggs
- (H) plants
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Let's think first: Pollination is the fertilization step in the sexual reproduction of plants. Pollination is the transfer of pollen grains to a stigma. The transfer of pollen grains to a stigma is the fertilization step in the sexual reproduction of plants.... So the answer is [(A)]


What is a source of drinking water?
Options:
- (A) ice expanding in rock openings
- (B) helping to prevent floods
- (C) industrial runoff
- (D) it helps plants in growing
- (E) Water seeping out of a spring
- (F) salt water
- (G) polluted water
- (H) Something with a head, thorax, and abdomen
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Let's think first: Streams may start with runoff or water seeping out of a spring. Lakes and streams are sources of drinking water. Water seeping out of a spring is a source of drinking water.... So the answer is [(E)]


What can have special excretory systems?
Options:
- (A) feces
- (B) barnacles
- (C) animals
- (D) cacti
- (E) fungi
- (F) wings
- (G) soil
- (H) insects
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Let's think first: Some arthropods have special excretory structures. Insects are the largest group of arthropods. Some insects have special excrectory structures.... So the answer is [(H)]


What animal found on earth would belong to the phylum platyhelmintes?
Options:
- (A) bilaterally symmetrical worms
- (B) Something with a head, thorax, and abdomen
- (C) remains of prehistoric life
- (D) Something that makes plants green
- (E) Microscopic organisms
- (F) female sex cells
- (G) it helps plants in growing
- (H) share properties
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Let's think first: Flatworms belong to the phylum Platyhelminthes. Flatworms are bilaterally symmetric. Bilaterally symmetric worms belong to the phylum Platyhelminthes.... So the answer is [(A)]


How do dogs conserve body heat?
Options:
- (A) their blood cells
- (B) fur and fat
- (C) their nails
- (D) layers of fat
- (E) Exfoliation
- (F) sweating
- (G) their fur
- (H) their hair
--
Let's think first: Mammals conserve body heat with their hair or fur. Dogs, of course, are mammals. Dogs conserve body heat with their fur.... So the answer is [(G)]


What is part of an animal's excretory system?
Options:
- (A) alveoli
- (B) garbage chute
- (C) pollen
- (D) glucose
- (E) bloodstream
- (F) kidneys
- (G) food
- (H) intake
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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: Organs of excretion make up the excretory system. Leptospiral organisms cause infection in the kidneys and are excreted in urine. Kidneys are part of the excretory system.... So the answer is [(F)]