A biodiversity hotspot is a(n) :
a. protected area with few humans present.
b. type of island from which humans are leaving.
c. an area rich in endemic species and high in human population.
d. a type of corridor to which humans are rapidly migrating.
e. an area poor in endemic species in a tropical location.
C
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Homeotic genes
a. code for homeodomains. b. code for regulatory proteins. c. are a class of master genes. d. affect transcription. e. are all of these.
When food is abundant , the cellular slime mold secretes cAMP into the environment to signal the
formation of a multicellular slug-shaped colony. __________________ Indicate whether the statement is true or false.
The base sequences that are left behind after the introns have been spliced out by enzymes are the ________
A) genes B) anticodons C) exons D) phosphates
In the "kitchen-sink model" for CD4 T-cell loss, what does the sink's drain represent?
A. the amplification of the virus in the blood B. the wide variety of possible opportunistic infections C. the destruction of the virus by the immune system D. the production of new CD4 T cells E. the destruction of CD4 T cells by the virus