Which components of an atom have negative
charges?
I. electrons
II. protons
III. neutrons
a. I only
b. II only
c. III only
d. I and II
e. II and III
A
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How does an "activated" receptor transfer information into the cell?
A. by altering its ligand-binding site B. through a conformational change C. by decreased phosphorylation D. by increased translation
The opening that light passes through as it enters a single-lens eye is termed the
A. pupil. B. retina. C. sclera. D. aqueous humor. E. iris.
In Drosophila melanogaster there is a sex-linked gene for eye color that is found only on the X
chromosome. The allele for red eye color (Xw+) is dominant over the allele for white eye color (Xw). You examine a vial of 100 flies that are all offspring from a single genetic cross. You see only redeyed females present, but you see both red-eyed and white-eyed males present. The genotypes of the parents were
a. Xw+Xw+; Xw+Y. b. XwXw; Xw+Y. c. Xw+Xw; XwY. d. Xw+Xw; Xw+Y. e. XwXw; XwY.
To reproduce, many plants produce seeds–structures containing embryonic offspring along with nutrients inside a tough case. These offspring develop after being released by the parent plant
To which animal reproductive strategy is seed production most comparable? A) oviparous reproduction B) ovoviviparous reproduction C) viviparous reproduction