In the cross Cc ? Cc, gametes have a ____ chance of receiving either allele
a. 25?75
b. 50?50
c. 75?25
d. 60?40
e. 90?10
B
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When scientists are attempting to breed for increased ability of a plant to utilize carbon dioxide they must consider improvement of:
A. stomatal openings B. bundle-sheath cells C. mesophyll air spaces D. chlorophyll production E. stress tolerance
The term facultative refers to
A. using chemicals for energy production. B. using light for energy production. C. the ability to exist in a wide range of conditions. D. using oxygen for metabolism. E. existing in a very narrow niche.
The ________ gene is responsible for removing many of the drugs introduced into the human body
A) HAR-1 B) CYP2D6 C) ASPM D) FOXP2 E) BRCA1
In the presence of infection, white blood cells release endogenous chemicals called _________, which produce fever.
A) pyrogens B) histamines C) leukotrienes D) catecholamines