The ____ are the most diverse animal group
a. Vertebrates
b. Insects
c. Humans
d. Protozoans
e. Mollusks
ANSWER: b
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How is life defined?
A) The only requirement for life is the ability to reproduce. B) Life is defined through a set of shared characteristics that all living things display. C) A living thing must be able to move. D) Life is determined by neural activity.
Assume a genetic analysis of a sick animal's DNA indicates that part of one chromosome does not belong to the animal. It is foreign DNA and is not similar to any of the animal's normal genes. It most likely comes from a(n)
A) viral infection. B) bacterial infection. C) archaeal infection. D) prion infection. E) fungal infection.
Double-ringed nitrogenous bases like adenine and guanine in DNA always bond with other double-ringed bases.
a. true b. false
The lateral movement of transmembrane proteins can be restricted by several different mechanisms. Which mechanism best describes the process by which focal adhesions are formed to promote cell motility?
(a) proteins are tethered to the cell cortex (b) proteins are tethered to the extracellular matrix (c) proteins are tethered to the proteins on the surface of another cell (d) protein movement is limited by the presence of a diffusion barrier