What substance is used in medicine to produce various images of organs and tissues?

What role do traits play in affecting an organisms ability to reproduce? finches

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.