Why are the tails of woodpeckers and Chimney Swifts stiffened at the end?

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

Name the organs of humanelemintary canal.

Plz ! a frog has a genetic mutation in skin cells that causes part of its skin to turn orange the frog will not pass this genetic mutation onto its offspring because, a. the offspring will inherit skin cells from the other parent. b. mutated skin cells cannot divide and produce daughter skin cells. c. skin cells do not contribute genetic material to sex cells. d. parents do not contribute genetic material to their offspring.