Cyclic gmp, or cgmp, acts as a signaling molecule whose effects include relaxation of smooth muscle cells in artery walls. in the penis, this signaling pathway and the resulting dilation of blood vessels leads to an erection. select the correct statement about the effect of viagra on this signaling pathway.

An example of a trait that would be considered acquired and inherited is a. a cleft chin b. muscle tone c. scar tissue d. freckled skin

Awire-hair terrier and a smooth-hair terrier are mated. the offspring produced are 6 wire-hair puppies and 2 smooth-hair puppies. a. what pattern of inheritance best describes this situation? b. what is the genotype(s) of the wire-haired puppies? of the smooth-haired puppies? c. what would be the expected genotype and phenotype ratios of a mating between 2 wire-haired terriers that are heterozygous?

Why do we perceive objects as retaining their brightness under different lighting levels?