Saltwater excretion reduces what?
Options:
- (A) emissions
- (B) dehydration
- (C) light energy
- (D) bacteria
- (E) sweat
- (F) energy usage
- (G) evaporation
- (H) body heat
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Let's think first: Sweating reduces body heat. Sweat is made of salt and water. Saltwater excretion reduces body heat.... So the answer is [(H)]


What are not cells at all, so they are neither prokaryotes nor eukaryotes?
Options:
- (A) Something with a head, thorax, and abdomen
- (B) Microscopic organisms
- (C) The smallest agent of disease
- (D) Dead prehistoric beings
- (E) female sex cells
- (F) major threat to health
- (G) remains of prehistoric life
- (H) Something that smells like rotten eggs
--
Let's think first: Viruses are not cells at all, so they are neither prokaryotes nor eukaryotes. Viruses Viruses are the smallest agents of disease. The smallest agents of disease are not cells at all, so they are neither prokaryotes nor eukaryotes.... So the answer is [(C)]


What does an earthworm do that would help plants?
Options:
- (A) reusing materials
- (B) It helps them survive
- (C) eat the plant
- (D) scare away birds
- (E) reproduce
- (F) hydrate their cells
- (G) burrow in the dirt
- (H) eat all the dirt
--
Let's think first: Earthworm burrows help aerate soil, which is also good for plants. Dirt is really misplaced soil. Earthworm burrows help aerate dirt, which is also good for plants.... So the answer is [(G)]


What is an example of a tetrapod vertebrate?
Options:
- (A) genus
- (B) Leeuwenhoek
- (C) a fish
- (D) crocodile
- (E) animals
- (F) four limbs
- (G) warm-blooded
- (H) graptolites
--
Let's think first: Reptiles are a class of tetrapod vertebrates that produce amniotic eggs. Crocodiles, snakes, and lizards are all types of reptiles. Crocodiles are a type of tetrapod vertebrates that make amniotic eggs.... So the answer is [(D)]


What have humans collected and grown for thousands of years?
Options:
- (A) Organic compounds
- (B) types of coral
- (C) types of ferns
- (D) bioaerosols
- (E) Most plants
- (F) types of fungus
- (G) types of pine trees
- (H) peachleaf willow
--
Let's think first: Humans have collected and grown mushrooms for food for thousands of years. Yeast and mushrooms are types of fungus. Humans have collected and grown types of fungus for food for thousands of years.... So the answer is [(F)]


What happens when people flow into or out of a population?
Options:
- (A) genetic morphing
- (B) death
- (C) gene flow
- (D) movement
- (E) generic flow
- (F) interact
- (G) competition
- (H) gene expression
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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: Gene flow occurs when individuals move into or out of a population. People are individuals, and each person has different needs. Gene flow occurs when people move into or out of a population.... So the answer is [(C)]