Drier climates tend to prevail:a
on the windward side of mountains.
b. in a rain shadow.
c. close to the coast of the continent.
d. in temperate regions.
e. only in the northern hemisphere
b
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Darwin recognized that ____ had generated the amazing diversity of organisms on Earth
a. descent with modification b. genetic mutations c. genetic variation d. differences in allele frequencies e. differences in genotype frequencies
Repressible genes are usually actively transcribed when:a
repressor molecules bind to the promoter. b. the supply of the end product formed by the enzymes encoded by these genes is low. c. tryptophan accumulates in the cell. d. quantities of precursor materials are high. e. there is no other substrate that can be used by the cell.
In Type-I survivorship, the young have a high probability of surviving
____________________ Indicate whether the statement is true or false.
Which of the following is the end goal of a negative feedback system?
A. Hybridization B. Reproduction C. pH adjustment D. Homeostasis E. Evaporation