Answer:
DNA tightly coils around proteins and condenses into chromosomes, which fit in the nucleus.
Explanation:
Answer:
The oxygen cycle is closely linked to the carbon cycle and the water cycle (see hydrological cycle). ... Carbon dioxide enters the carbon cycle or is taken up by plants for photosynthesis. During photosynthesis oxygen is evolved by the chemical splitting of water and returned to the atmosphere
Explanation:
Answer:
4
Explanation:
One division into the p1 generation, and then the p1 generation makes the p2 generation, making it 4 cellular divisions.
