NEET BIOLOGY

Detailed explanation-1: -Sexual reproduction takes place by two special kinds of cells-the male gamete known as the sperm and the female gamete known as the egg or ovum. Sexual reproduction in animals is the combination of the sperm provided from the male and the egg provided by the female through a process known as fertilization.

Detailed explanation-2: -Animals may reproduce asexually through fission, budding, fragmentation, or parthenogenesis.

Detailed explanation-3: -Sexual reproduction occurs in a variety of ways in animals. In some species, such as fish, the male releases sperm over the eggs after the female has laid them. In other species, such as birds and most mammals-including human beings-the male releases sperm into the female reproductive tract.

Detailed explanation-4: -Animals can reproduce both by sexual as well as asexual means. Simple animals like Hydra, reproduce asexually by the process of budding. Some animals like tapeworms can reproduce both asexually as well as sexually. Higher and more complex animals like birds and mammals can reproduce only by sexual means.

Detailed explanation-5: -The vast majority of animals need to breed to reproduce. But a small subset of animals can have offspring without mating. The process, called parthenogenesis, allows creatures from honey bees to rattlesnakes to have so-called “virgin births.”