Sex cells: Male gamete=sperm, Female gamete=egg
A. Angiosperm
B. Gamete
C. Zygote
D. Stigma
B. Gamete
The correct answer is B. Gamete.
In sexual reproduction, gametes are the specialized reproductive cells that are involved in the fusion of genetic material from two individuals. In plants, the male gamete is called sperm, which is produced in the pollen grains, and the female gamete is called an egg or ovum, which is present in the ovary. Therefore, in the given options, the male gamete is sperm, while the female gamete is an egg.
The correct answer is B. Gamete.
To arrive at the correct answer, first you need to understand the definitions of each term:
1. Angiosperm: This refers to a group of flowering plants that produce seeds enclosed within a protective ovary.
2. Gamete: These are the reproductive cells that are involved in sexual reproduction. They are formed in the gonads (testes in males, ovaries in females) and are responsible for carrying genetic information. In humans, the male gamete is called sperm and the female gamete is called an egg or ovum.
3. Zygote: This is the cell that results from the fusion of sperm and egg during fertilization. It is the first cell of a new individual and contains a complete set of genetic information.
4. Stigma: In botany, the stigma is a part of the female reproductive structure of a flower. It is the sticky or receptive surface where pollen grains adhere and germinate to allow for fertilization.
Among the given options, only "Gamete" matches the definition of "sex cells." Hence, the correct answer is B. Gamete.