The primary but not only process responsible for the modifications that occur in organisms over geological time is:

a. genetic mutation.
b. natural selection.
c. morphological (phenotypic) modification.
d. increase in fitness.


B

Biology & Microbiology

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Two strains of S. cerevisae (yeast) are crossed. One has the genotype ABC and the other abc. Five sets of the resultant tetrads are noted below. In which set did a gene conversion event occur?

A) abc, aBc, AbC, aBC B) abc, abc, ABC, ABC C) aBc, aBc, AbC, AbC D) abC, abc, ABc, ABC E) Abc, Abc, aBC, aBC

Biology & Microbiology

A cell that is Hfr and a cell that is F+ can be the same cell.

Answer the following statement true (T) or false (F)

Biology & Microbiology

What second messenger is directly involved in activating protein kinase C (PKC)?

A. DAG B. cGMP C. G protein D. cAMP E. phospholipase C

Biology & Microbiology

In a tetraploid species, a euploid individual would have ________ sets of chromosomes.

A. 6 B. 8 C. 4 D. 2 E. 2n+2

Biology & Microbiology