The most primitive multi-cellular animals produce what?
Options:
- (A) Electrical energy
- (B) eggs and sperm
- (C) harmful substances
- (D) scarce resources
- (E) Organic compounds
- (F) Chemical energy
- (G) fur and fat
- (H) aerobic capacity
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Let's think first: Adult sponges produce eggs and sperm. Sponges are the most primitive multicellular animals. The most primitive multi-cellular animals produce eggs and sperm.... So the answer is [(B)]


Most _ feed on bacteria and algae that use sunlight to make food.
Options:
- (A) Energy
- (B) Lobsters
- (C) Most plants
- (D) Seaweed
- (E) Starfish
- (F) plant life
- (G) Copepods
- (H) energy usage
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Let's think first: Phytoplankton are bacteria and algae that use sunlight to make food. Most copepods feed on phytoplankton. Most copepods feed on bacteria and algae that use sunlight to make food.... So the answer is [(G)]


Most of what type of animal is known for having a shell?
Options:
- (A) fossils
- (B) toads
- (C) eggs
- (D) swea
- (E) small
- (F) insects
- (G) porous
- (H) snail
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Let's think first: Most mollusks have shells. Among mollusks, the golden snail is a survivalist. Most snails have shells.... So the answer is [(H)]


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 has a characteristic life cycle that includes alternation of generations?
Options:
- (A) humans
- (B) leaves
- (C) Oak
- (D) dogs
- (E) Trees
- (F) cacti
- (G) amoeba
- (H) ferns
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Let's think first: All plants have a characteristic life cycle that includes alternation of generations. All ferns are shade plants. Ferns have a characteristic life cycle that includes alternation of generations.... So the answer is [(H)]


Some touch receptors sense a difference in pain or what?
Options:
- (A) heat
- (B) cold
- (C) skin
- (D) nerves
- (E) color
- (F) contact
- (G) smell
- (H) motion
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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: Some touch receptors sense differences in temperature or pain. Heat and temperature are the same. Some touch receptors sense differences in heat or pain.... So the answer is [(A)]