What have we learned from fossil evidence about evolution? It is an abrupt change.

The process is observable.

It takes place during one lifetime only.

The most complex traits are always selected.

Which of the following statements are true chromosomes make up genes

Theories basic to all of the life sciences include the germ theory of disease. theory of evolution by natural selection. o two of these answers are correct none of these answers are correct o cell theory.

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important