Question

Give reason for the following:
(a) The human testes are located outside the abdominal cavity.
(b) Some organisms like honeybees are called parthenogenetic animals.

Answer 1

Hint:The testicles make sperm.To do this, the temperature of the testicles needs to be cooler than the internal of the body. Parthenogenesis that happens by apomixis involves the replication of an egg by mitosis resulting in diploid cells that are clones of the parent.

Complete answer:
To answer this question, we have to know about the human testes and parthenogenetic animals. The testes are also called testicles which are two oval-shaped organs in the male reproductive system. They are kept in a cavity of the skin layer of the scrotum. The scrotum hangs exteriorly in the forepart of the pelvic area near the upper thighs.
Human testes lie outside the human body because it helps in spermatogenesis as the process of sperm formation requires a warmness lower than the body temperature.
Parthenogenesis refers to the growth of an embryo from an unfertile egg cell in animals. In plants parthenogenesis is a method of apomixis. Haploid organisms, however, are commonly unusable, and parthenogenetic offspring commonly have the diploid number of chromosomes.
Parthenogenesis is the reproduction from an ovum without fertilization. In honeybees, ovum grows and matures into an individual without fertilization and hence is parthenogenetic.

Note:Structures within the testes are important for the production and storage of sperm until they’re mature enough for ejaculation. The testes also produce a hormone called testosterone. Parthenogenesis is an adaptive strategy that allows organisms to reproduce when sexual reproduction is not possible due to environmental conditions.