__________ shifts the range of variation in traits in one direction Fill in the blank(s) with the appropriate word(s)
ANSWER: Directional selection
You might also like to view...
A vein is a blood vessel that always carries
a. blood toward the heart. b. blood away from the heart. c. oxygen-rich blood. d. oxygen-poor blood.
Undigested material flows from the ascending colon directly into the:a
transverse colon. b. duodenum. c. cecum. d. rectum. e. descending colon.
________ are strains that are unable to grow on a minimal medium that supports growth of the wild type strain, but are able to grow on the minimal medium if one or more nutritional supplements are added.
A. Auxotrophs B. Prototrophs C. Minitrophs D. Autotrophs
All of the following pertain to HIV, except
A. it attaches primarily to host cells with CD4 receptors. B. the viral DNA integrates into the host nucleus. C. it can enter into nervous tissues and cause abnormalities. D. it causes Kaposi sarcoma. E. it has reverse transcriptase.