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.

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

The specific heat of ice is 0.5 calories/gram°c. 20 grams of ice will require ll calories to raise the temperature 1°c. 05

How are fungi more like an animal? they have a cell wall. they are heterotrophs that absorb their food. they produce seeds and have membrane-bound nucleus. they use sunlight for photosynthesis.