Author Question: Mutations are the most important source of variety on which natural selection depends and operates. ... (Read 167 times)

roselinechinyere27m · **on:** Aug 11, 2018

Mutations are the most important source of variety on which natural selection depends and operates. There are two forms of mutations,

A. both discovered by Mendel.
B. cancer-causing mutations and chromosomal rearrangement.
C. and both occur only during the development of an individual.
D. called base substitution mutation and chromosomal rearrangement.
E. and both always result in phenotypic change.

Question 2

DNA molecules

A. were discovered in the decade after Darwin's death.
B. make up genes and chromosomes, which are basic hereditary units.
C. initiate and guide the construction of complex sugars.
D. are made up of three bases: adenine, cytosine, and factor.
E. are the messenger molecules of RNA.