Answer:
The evolution of the heart is based on the separation of oxygenated blood from deoxygenated blood for efficient oxygen transport. pisces have a dual chambered heartwhile reptiles and amphibians are having a three chambered finally aves and mammals have four chambered hearts.
Explanation:
please mark as brilliant answer
46 chromosomes is divided into two cells so 46/2 = 23
Answer:
well 5 is easy its the axis
It is a perfect example of a natural selection.
(I'm not sure if this is the exact answer that you are looking for.)
Answer:
From the Runoff of the land near a body of water
Explanation:
Nitrogen and phosphorus enter the water system from fertilizer applications on lawns and gardens due to rainfall. When these nutrients aren't absorbed by plant roots, they're washed out of the soil by excessive irrigation and rain and carried into storm drains and natural water sources.