Why do certain hormones, like insulin, need receptor tyrosine kinases to bind to?
1. they are too large.
2. they are hydrophobic.
3. they are nonpolar.
4. they are water soluble.
answers
a) 1 only
b) 1 and 4
c) 1, 3, and 4
d) 2 and 4

Plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.