Final answer:
Haploid cells include both sperm and egg cells, which are reproductive cells or gametes containing one set of chromosomes. All options provided—sperm cell, gamete, and egg cell—are examples of haploid cells. The option (D) is correct.
Step-by-step explanation:
An example of a haploid cell is d. All of the above are correct. In human beings, both sperm and egg cells are haploid gametes, which means they contain a single set of chromosomes.
These cells are produced through a process called meiosis, where diploid germ cells divide to form haploid reproductive cells. Haploid cells such as sperm and egg are essential for the process of fertilization, which occurs when two haploid gametes fuse to form a diploid zygote, thus restoring the diploid chromosome number. Therefore, option (D) is correct.