Condoms are _________.
Condoms are _________.
(Check all that are true)
[A] attached using a strong adhesive
[B] worn for up to one week
[C] a way to prevent STDs
[D] safe, effective, and easy to obtain
C and D
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Facilitated diffusion is an important method for cells in obtaining necessary molecules and removing other ones. Requirements for facilitated diffusion include
A. The carrier molecule must be specific to the molecule that is transported. The direction of movement is always with the concentration gradient, never against the gradient. B. The carrier molecule is nonspecific to the molecule that is transported. The direction of movement is always with the concentration gradient, never against the gradient. C. The carrier molecule is nonspecific to the molecule that is transported. The direction of movement is always against the concentration gradient, never with the gradient. D. The carrier molecule must be specific to the molecule that is transported and an ATP molecule must be attached to the specific carrier. The direction of movement is always against the concentration gradient, never with the gradient.
A vaccine for the common cold is not feasible because
A. the surface antigens of rhinovirus mutate frequently. B. the cause is unknown. C. the rhinovirus cannot be grown in sufficient quantities. D. there are more than 100 types of rhinovirus.
A mycelium is a mass of what structures?
a. thallus b. hyphae c. peptidoglycans d. pellicles
A population carries two alleles for a trait in which T is dominant and t is recessive. In the Hardy-Weinberg equation, 2pq represents the
A) proportion of homozygous dominant individuals. B) decrease in heterozygous individuals. C) proportion of homozygous recessive individuals. D) increase in homozygous individuals. E) proportion of heterozygous individuals.