Am amniotic egg is first developed in the reptiles.
The membrane and shell make a protective membrane that can provide a safe environment for the cells to divide, and embryo to develop. Animals having an amniotic shell are called as amniotes. The other body parts develop later on.
The number of species on Earth tagged at 8.7 million as of 2011.
Answer:
Adrenaline
Explanation:
The is the burst of energy caused by enzymes that send messages to the brain.Thus,resulting in Flight or Fight mechanism.
Answer:
Controls blood flow to regulate body temp.
Explanation:
Circulatory system deals with flow/transport of blood