Whether environmental changes are fast or slow, organisms living in an environment must have to help them survive; otherwise, they will die.

This rapid change in species that rarely leaves behind fossil evidence is referred to as

The lineage of pea plants produced round seeds for four generations. the plants that fertilized these pea plants also produced round seeds. however, in the fifth generation, the plant produced to two plants with wrinkled seeds. can that be possible?

Which muscle cell structure stores calcium ions that are used to trigger the contraction?