Directional selection would be expected to occur if
A. a new allele arises by mutation that increases fitness.
B. the environment changes.
C. the population is large.
D. a new allele arises by mutation that increases fitness and the environmental changes increase the allele frequency.
E. a new allele arises by mutation that increases fitness, the environment changes and the population is large are correct.
D. a new allele arises by mutation that increases fitness and the environmental changes increase the allele frequency.
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A protonema
(a) is part of the sporophyte generation of a moss. (b) is the product of spore germination of a moss. (c) looks very much like a filamentous brown alga. (d) produces the sporophyte when a bud grows from it
If the wild type DNA sequence reads THE CAT ATE THE BIG RAT, what type of mutation would change the sequence to THE CAT ATE THE BAG RAT?
A. Nonsense B. Silent C. Point D. Deletion E. Insertion
The longest portion of the large intestine region is known as the _____________.
A. lumen B. appendix C. rectum D. cecum E. colon
With __________, offspring inherit the same number and kinds of genes from one parent.
Fill in the blank(s) with the appropriate word(s).