When earth completes a full rotation, how much time has elapsed?

The answer is; 24 hours.

Scientists called the full rotation of the earth a day and divided it into 24 hours on the clock. This means from sunrise to next sunrise. They also divided the earth into latitudes that indicate time zones. When one point on earth rotates and return to the same position in space, it has lapsed 24 hours.

apical dominace

Explanation:

is when the main stem grows more strongly than branches. It is an occurrence where the the central stem is dominant as compared to the other stems. It is a common phenomenon in a plant's stems and aerial parts. It happens when the the apex prevents the lateral buds' growth so plant grows vertically in such case.