Which of the following most specifically explains why relay proteins only bind receptor tyrosine kinases (RTK) after activation? a. SH2 domains are only present in the relay proteins after activation
b. SH2 domains in the relay proteins only bind Tyr that has been phosphorylated in the RTK
c. SH2 domains in the relay proteins must be phosphorylated on Tyr to bind RTK
d. SH2 domains in the relay proteins only phosphorylate Tyr in the RTK after activation
e. SH2 domains in the RTK must be phosphorylated on Tyr to bind relay proteins

Give an example of a trait that is controlled by more than one gene.

Amap's orientation is typically determined by an

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.