You and your biology lab class take a field trip to a marine aquarium. Your guide is a marine biologist who studies squids. She explains to your class how squids are able to blend into their environment. She points out that squids have pouches of pigments embedded in their epithelium. The pouches are called
A. chromatophores.
B. lophophores.
C. trochophores.
D. spermatophores.
E. phytophores.
Answer: A
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__________ is the study of body plans and structures
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conclude? A) The group must have mutated twice. B) The trunks of the plants were used as canoes to cross the Atlantic Ocean. C) Convergent evolution occurred. D) West Africa and South America were once joined.
Antibiotics can kill ________________ in the human body, which may sometimes lead to health problems such as inflammatory bowel disease
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