For an animal to move in one direction, it must exert a force in the ____________________ direction
Fill in the blank(s) with correct word
opposite
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Which statement about immunodeficiency is true?
a. Immunodeficiencies allow pathogens to proliferate. b. Immunodeficiencies are typically present at birth. c. Immunodeficiencies tend to trigger hypersensitivities. d. Immunodeficiencies block autoantibodies from developing.
Compared to mammals and reptiles, what characteristic prevents amphibians from surviving far from water?
A. Their limbs are too weak to support their weight on land. B. Their cartilaginous endoskeleton would dry out on land. C. They do not have any lungs and cannot breathe out of the water. D. Their eggs do not have an amnion to prevent them from drying out.
When a protein denatures, what type of
bonding is affected?
a. covalent b. peptide c. ionic d. hydrogen e. metallic
The area labeled "A" is ____
a. a nucleus b. chromatin c. the nuclear membrane d. a vacuole e. a nucleolus