Answer:
Here are some examples of natural selection: In a habitat there are red bugs and green bugs. The birds prefer the taste of the red bugs, so soon there are many green bugs and few red bugs. The green bugs reproduce and make more green bugs and eventually there are no more red bugs.
Explanation:
Single celled organisms such as amoebas, especially those that live in fresh water, continually gain water from their surrounding environment by osmosis. This water is pumped into a contractile vacuole which fills with fluid and periodically fuses with the cell membrane, releasing its contents to the exterior. Thus the amount of water actively transported out of the cell is equal to the amount of water entering the cell due to osmosis and there are no variations in the tonicity of the cell. This is homeostasis at a simple level. Without the contractile vacuole, the amoeba would continue to absorb water until its cytoplasmic contents were diluted to such an extent that metabolism no longer occurred and it would die.
Answer:
A: Myelin sheath
Explanation:
Myelin sheath swiftly transmits electrical impulses along nerve cells.
Answer:
I think it might be the cell membrane
Explanation:
correct me if I’m wrong
The change where they didn't only have boys anymore but had a boy which was born was more likely due to the fact that there is generally a 50:50% chance of whether a boy or a giril will be born for any given family.