Human And Social Biology - Reproduction

1. The release of ova from the ovary is

Conception

Copulation

Ovulation

Implantation

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.

Explanation

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.

2. Cancer of the ovary is not common, but it causes more deaths than other female reproductive cancers.

True

False

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.

Explanation

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.

3. How long does the ovum live until it is no longer viable?

12 hours

18 hours

24 hours

48 hours

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.

Explanation

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.

4. Which of the following is not an advantage of asexual reproduction?

Genetic variation introduced

Successful characteristics are passed on to off springs

Often results in large numbers of off springs

No need to find a mate

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.

Explanation

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.

5. A gamete is a cell

Formed by fertilization

Produced by mitosis

With the haploid number of chromosomes

With the diploid number of chromosomes

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".

Explanation

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".

6. Which part produces sperm cells?

A

B

C

D

Part D produces sperm cells.

Explanation

Part D produces sperm cells.

7. What is the name of the structure labeled B on the diagram?

Urethra

Sperm duct

Ureter

Seminal vesical

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.

Explanation

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.

8. Reproduction ensures the survival of a species and ensures that identical genes are passed on to offsprings.

True

False

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.

Explanation

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.

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