Answer:
the answer is the white blood caells.
Answer:
D. Cyclin
Explanation:
Cyclins drive the events of the cell cycle by partnering with a family of enzymes called the cyclin-dependent kinases (Cdks). A lone Cdk is inactive, but the binding of a cyclin activates it, making it a functional enzyme and allowing it to modify target proteins.
The magnetosphere interacts with solar flares. It helps to redirect them. Otherwise, the Earth would be greatly heated and human life would become much harder to sustain, as homeostasis would require better cooling mechanisms.
