A
it's the most grammatically correct and understandable
Answer: Helps the plant breathe: The epidermis of the leaf contains guard cells that control and regulate the small pores on the undersurface of the leaves. These pores are called stomata. Stomata are responsible for regulating water in and out of the cell. It is also responsible for the exchange of gases across the epidermis.
It makes a longitudinal wave because it stretches and compresses while it slithers forward
Answer:
The cell cycle best repairs organism from a puncture wound.
Explanation:
Repairing in organism means restoration of damaged tissue and its functioning. In a cell cycle, a tissue is repaired through the process of Mitiosis in cell division. It helps in growth of cell.
Through this process identical cell copies are produced by which the punctured wound or damaged tissue is replaced. Thus, cell cycle is seen in playing an important role in repairing an organism.
Answer:
winter
Explanation:
On this image, we can see the Earth being tilted away by 23.5 degrees from the Sun. This tilting puts the Northern Hemisphere in a situation where it is the one that is tilted away from the Sun, thus it will receive less sunlight, as well as less direct sunlight. That will cause lower temperatures on the Northern Hemisphere, thus the winter season will start, and it will last for around three months, at least at the mid-latitude zones. On the other side, the Southern Hemisphere is more exposed to the Sun during this tilting, so t receives more sunlight, and more direct sunlight, resulting in summer in this half of the planet.