In a certain species of cactus the cactus plant can be covered in Y shaped spines or X shaped spines. When crossing a cactus with Y shaped spines with a cactus with X shaped spines, some of the offspring had both Y shaped spines and X shaped spines. What type of inheritance has occurred in this scenario? * A) Codominance
B) multiple alleles
C) Incomplete dominance
D) Sex-linked inheritance

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.

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.

In which part of the body is a ball-and-socket joint found?