Which hormone deficiency would lead to a female that is not ovulating?
A. follicle-stimulating hormone
B. epinephrine
C. cortisol
D. testosterone
E. calcitonin
A. follicle-stimulating hormone
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Eukaryotic cell membranes use many sterol molecules for construction, which contrasts with archaeal membranes that utilize ________.
Fill in the blank(s) with the appropriate word(s).
The innermost layer of the root cortex, known as the ____, is a selectively permeable barrier that helps control the
movement of water and dissolved minerals.
a. endodermis b. root cap
c. quiescent center d. pericycle e. root hairs
The mechanisms that reoviruses have evolved to evade the host immune system include ALL of the following EXCEPT
a. capping and methylation of virus mRNAs by viral enzymes. b. genome replication within the nucleocapsid. c. the use of host nucleotides for RNA synthesis. d. denaturing of proteolytic enzymes in host lysosomes.
The form of nitrogen most likely to be absorbed from the soil by plants is
A. nucleic acids. B. nitrogenous wastes. C. nitrous oxide gas. D. nitrogen gas. E. nitrite/nitrate ions.