a. Reproductive Cycle Reproduction in all vertebrates (especially mammals and birds usually occurs when the most favorable conditions for success are present.
(a. Reproductive Cycle Reproduction in all vertebrates; occurs; T:when the most favorable conditions for success are present; T:usually) (the most favorable conditions for success; are; present)
a. Reproductive Cycle Reproduction in all vertebrates the most favorable conditions for success
occurs are
T:when the most favorable conditions for success are present T:usually
present