survival to reproductive age of the varieties that are best adapted to existing environmental conditions. (2 words, no space)
Type of reproduction involving the union of gametes.
evolution where species from different lineages show similar characteristics because they are subject to similar selection pressures.
the diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant adaptive zone. (2 words, no space)
a group of organisms of one species that interbreed and live in the same place at the same time
Cell division involving the production of gametes.
the human intervention in animal or plant reproduction to ensure that certain desirable traits are represented in successive generations. (2 words, no space)
a limb with five digits, such as a human hand or foot, which is found in many amphibia, reptiles,
birds, and animals, which can allow us to deduce that all species in these categories derived from one common ancestor.
a remnant, or representation, of an organism that existed in a past geological age, or of the activity of such an organism, occurring in the form of mineralized bones, shells, etc., as casts, impressions, and moulds.
trait structures which are similar because of convergent evolution
a chemical produced by microbes to kill off competing microbes.
type of evolution in which the change in the genetic composition of a population during successive generations, as a result of
natural selection acting on the genetic variation among individuals, and resulting in the development of new species.
an increased amount of black or nearly black pigmentation (as of skin, feathers, or hair) of an organism, resulting from the presence of melanin.