The most common arrangement of toes seen in birds in which three toes point forward and one toe points backward is called?

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

Which is not a type of symmetry? a. asymmetryb. radial symmetryc. bilateral symmetryd. lateral symmetry