The cancer-causing forms of the Ras protein are involved in which of the following processes?
A) relaying a signal from a growth factor receptor
B) DNA replication
C) DNA repair
D) cell-cell adhesion
E) cell division
Answer: A
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The function of nectar is:
A. provision of carbohydrates for the plant B. attraction of pollinators C. preservation of delicate flower parts D. a sticky trap for parasitic insects E. none of the other choices provided
The molecule shown above is the pyrimidine ____, which is typically found in both DNA and RNA
a. thymine b. adenine c. uracil d. guanine e. cytosine
Which part of the life cycle does a pollen grain represent?
A) a spore B) a sperm cell C) a male gametophyte D) a male sporophyte
Horizontal gene transfer
A) can accelerate evolution of a species. B) can inhibit evolution of a species. C) has no role in evolution. D) has a role in evolution only if the gene transfer is to a different species.