Which of the following animals does NOT

have an endoskelton?



a. sea stars
b. snakes
c. frogs
d. oysters
e. all of these animals have an endoskeleton


D

Biology & Microbiology

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Which of the following is FALSE when comparing RNA and DNA?

A. Both contain nucleotides connected by phosphodiester linkages. B. Both contain phosphate groups. C. Both are composed of nucleotides that contain sugars. D. Both are composed of identical nucleotides. E. Both are composed of nucleotides that contain a phosphate group, a pentose sugar, and a nitrogenous base. F. Both have a 5’ end and a 3’ end. G. Both are composed of purines and pyrimidines.

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Shells of forams consist of organic matter reinforced by

a. silica. b. cellulose. c. calcium carbonate. d. copper sulfate. e. hydrogen sulfide.

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List and briefly explain the organization of life, beginning at the molecular level and continuing through the biosphere

What will be an ideal response?

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Your neighbor tried to lift a propane tank onto the back of his pickup truck and ruptured the cartilaginous disk between two of his vertebrae. What is most likely to happen to him?

A) He will suffer pain from a compressed spinal nerve. B) He might have severe brain damage. C) His spinal nerve cord will enlarge. D) He will have bloody stools.

Biology & Microbiology