In fruit flies the gene for vestigial wings will produce tiny underdeveloped wings at room temperature but will produce normal wings at higher temperatures. The vestigial condition in fruit flies is determined by
A. heredity and environment.
B. pleiotropy.
C. linkage.
D. gene imprinting.
A. heredity and environment.
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Most peptic ulcers are caused by ____
a. antibiotics b. bacteria c. heartburn d. lactose intolerance e. malnutrition
Which statement is true?
a. Blood flows from areas of high hydrostatic pressure in the arterioles to low hydrostatic pressure in the arteries. b. Blood flows from areas of low hydrostatic pressure in the arterioles to high hydrostatic pressure in the arteries. c. Blood flows from areas of high hydrostatic pressure in the arteries to low hydrostatic pressure in the arterioles. d. Blood flows from areas of low hydrostatic pressure in the arteries to high hydrostatic pressure in the arterioles.
Four of the five answers listed below are characteristics of water. Select the exception
a. stabilize temperature b. common solvent c. cohesion and surface tension d. produce salts e. change shape of hydrophilic and hydrophobic substances
A selection coefficient of 1 means zero fitness
Indicate whether the statement is true or false