Human egg has an animal pole. Describe briefly the two events that take place at this pole.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Animal Pole**: The animal pole of the human egg is the region where the nucleus is located. It is one of the two poles of the egg, the other being the vegetal pole, which is opposite to it.

2. **First Event - Sperm Entry**: The first significant event that occurs at the animal pole is the entry of the sperm. When fertilization occurs, the sperm penetrates the egg at this pole. This is crucial as it is the point where the male gamete (sperm) comes into contact with the female gamete (egg).

3. **Second Event - Cleavage Initiation**: The second event that takes place at the animal pole is the initiation of cleavage. After fertilization, the process of cleavage begins at the animal pole and progresses towards the vegetal pole. Cleavage is the series of rapid cell divisions that occur after fertilization, leading to the formation of a multicellular embryo.

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