Crossing over is the process whereby
homologous chromosomes exchange chromosomal material,
sister chromatids pair at the centromeres,
homologous pairs of chromosomes separate and migrate toward a pole,
homologous chromosomes pair along their lengths.

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.

Wich is not standing in the way of astronomers getting a good view of different star