Humans have collected and grown what for food for thousands of years?
Options:
- (A) plants
- (B) fungi
- (C) ferns
- (D) cheese
- (E) fungus
- (F) salmon
- (G) hamburgers
- (H) primates
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Let's think first: Humans have collected and grown mushrooms for food for thousands of years. Mushrooms are an example of fungi. Humans have collected and grown fungi for food for thousands of years.... So the answer is [(B)]


Changing in animals occurs by a process called what?
Options:
- (A) world climate change
- (B) It helps them survive
- (C) natural selection
- (D) Leptospirosis
- (E) ozone
- (F) relocation
- (G) permineralization
- (H) animal growth
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Let's think first: Evolution occurs by a process called natural selection. Actually, evolution is adaptation to change. Changing occurs by a process called natural selection.... So the answer is [(C)]


What is the process of breaking down food into nutrients?
Options:
- (A) recycling
- (B) food processing
- (C) digestion
- (D) bacteria
- (E) eating
- (F) hydration
- (G) Dehydration
- (H) blender
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Let's think first: Digestion is the process of breaking down food into components the body can absorb. Nutrients are absorbed by the intestines and if the walls are coated, fewer nutrients are absorbed. Digestion is the process of breaking down food into nutrients.... So the answer is [(C)]


What group of animals are a tetrapod vertebrate that produce amniotic eggs?
Options:
- (A) class Reptilia
- (B) warm-blooded
- (C) more abundant
- (D) graptolites
- (E) animals
- (F) insects
- (G) mammals
- (H) barnacles
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Let's think first: Reptiles are a class of tetrapod vertebrates that produce amniotic eggs. Reptilia contains over 7800 entries on numerous species of reptiles. Animals in the class Reptilia are a class of tetrapod vertebrates that produce amniotic eggs.... So the answer is [(A)]


What is an arthopod with two wings?
Options:
- (A) rare
- (B) fly
- (C) two
- (D) host
- (E) Aves
- (F) male
- (G) bird
- (H) bats
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Let's think first: Most arthropods are insects. Flies are insects with two wings. Flies are arthropods with two wings.... So the answer is [(B)]


When many muscles contract a little bit, simultaenous, it produces:
Options:
- (A) forces
- (B) heat
- (C) cold blooded
- (D) sweat
- (E) electrical energy
- (F) Energy
- (G) pain
- (H) thermal displacement
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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: Shivering occurs when many muscles contract a little bit all at once. Heat production is increased by shivering and non-shivering thermogenesis . Heat production is increased when many muscles contract a little bit, all at once.... So the answer is [(B)]