Human And Social Biology - Reproduction

Ovulation refers to the release of an egg from the ovary. This is a crucial process in the female reproductive system, where a mature egg is released and becomes available for fertilization by sperm. Ovulation occurs approximately once a month during a woman's menstrual cycle. It is an essential step in the process of conception, as fertilization can only occur if the egg is released and meets with sperm. Therefore, ovulation is the correct answer in this context.

Cancer of the ovary is indeed not common, but it is responsible for more deaths than other female reproductive cancers. This means that even though it may occur less frequently, it has a higher mortality rate compared to other types of reproductive cancers in women. Therefore, the statement is true.

The ovum, or egg, has a lifespan of approximately 48 hours before it is no longer viable. This means that after it is released from the ovary during ovulation, it can be fertilized by sperm within this time frame. If fertilization does not occur within 48 hours, the ovum will begin to deteriorate and will not be able to result in a pregnancy.

The correct answer is "Genetic variation introduced." Asexual reproduction does not involve the fusion of gametes or the exchange of genetic material, so there is no introduction of genetic variation. Asexual reproduction produces offspring that are genetically identical to the parent, which can be advantageous in a stable environment but limits the ability to adapt to changing conditions.

A gamete is a cell that is formed by fertilization and it carries half the number of chromosomes as compared to the other cells in the organism. This is known as the haploid number of chromosomes. Gametes are involved in sexual reproduction and when they combine during fertilization, they restore the diploid number of chromosomes in the resulting zygote. Therefore, the correct answer is "with the haploid number of chromosomes".

Part D produces sperm cells.

The structure labeled B on the diagram is the urethra. The urethra is a tube that carries urine from the bladder to the outside of the body in both males and females. In males, it also serves as a passageway for semen during ejaculation.

Reproduction ensures the survival of a species by creating new individuals, but it does not necessarily ensure that identical genes are passed on to offspring. In sexual reproduction, offspring inherit a combination of genes from both parents, resulting in genetic variation. This variation is important for the adaptation and evolution of a species. Therefore, the statement is false.

The lining of the vagina secretes mucus and is the site where sperm are deposited.