Eyeglasses correct deficiencies in the function of the ____ in a near-sighted person
a. ciliary muscle
b. cornea
c. iris
d. lens
e. pupil
ANSWER: d
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An anticodon is a physical component of ________ molecule.
A) a tRNA B) an mRNA C) an rRNA D) a DNA
This graph shows both human birth weight and
newborn infant mortality. The most common birth weight is between seven and eight pounds. Human birth weight seems to be an example of a. directional selection. b. stabilizing selection. c. sexual selection. d. disruptive selection. e. artificial selection.
Which of the following events does not occur during meiosis I?
a. DNA exchange b. pairing of homologous chromosomes c. separation of sister chromatids d. separation of homologous chromosomes e. crossing-over between homologous chromosomes
The gland primarily responsible for the secretion of progesterone in women is the______.
A. anterior pituitary B. ovarian follicle C. corpus luteum D. posterior pituitary