Answer and Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files.
Answer:
Primary succession begins in barren areas, such as on bare rock exposed by a retreating glacier.
Explanation:
Answer:
-Includes reptiles, birds, and mammals
-All amniotes are tetrapods and vertebrates
-May involve a shelled egg or internal gestation
-Do not need for moist environment for reproduction
-Derived characters that identify an amniotes are 3 extra embryonic membranes: Chorion, Amnion, Allantois
-are Covered by shells
-Most hard and calcified
-Some soft (monotremes)
it has to do with one be more effective than the other.