Which of the following enzymes adds a phosphate group to target proteins in signal transduction pathways that involve a phosphylation cascade? a
adenylyl cyclase
b
phosphatase
c
kinase
d
G protein-coupled receptor

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

the dark variety, as they are not visible on the dark tree barks

explanation:

the fossil record provides evidence of a common ancestor to many species.

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: