Question 1

Which of the following is a characteristic of sexual reproduction?

Accepted Answer

Sexual reproduction requires two parents (male and female gametes) and produces genetically diverse offspring due to the combination of different genetic material.

Question 2

The process by which the male gamete (sperm) fuses with the female gamete (ovum) is called:

Accepted Answer

Fertilization is the fusion of sperm and ovum that results in the formation of a zygote, which is the first step in sexual reproduction.

Question 3

Which of the following is an example of asexual reproduction in plants?

Accepted Answer

Asexual reproduction in plants occurs through vegetative propagation methods such as runners, tubers, and fragmentation without involving gametes or fertilization.

Question 4

In human females, the matured ovum is released from the ovary during a process called:

Accepted Answer

Ovulation is the release of a mature ovum from the ovary, which typically occurs once every 28 days in the human menstrual cycle.

Question 5

In human reproduction, at which stage does the embryo implant itself into the uterine wall?

Accepted Answer

The blastocyst implants into the uterine wall approximately 6-7 days after fertilization, marking the beginning of pregnancy.

Question 6

Which of the following is the correct sequence of stages in the human menstrual cycle?

Accepted Answer

The menstrual cycle follows the sequence of menstruation (shedding of endometrium), follicular phase (estrogen rises), ovulation (release of egg), and luteal phase (progesterone rises).

Question 7

The average duration of the human menstrual cycle is approximately:

Accepted Answer

The normal menstrual cycle in humans lasts approximately 28 days, though it can vary between 21-35 days.

Question 8

In flower reproduction, the male gamete and female gamete fuse during a process called:

Accepted Answer

Fertilization is the fusion of male gamete (sperm) and female gamete (ovum) to form a zygote.

Question 9

During which phase of the menstrual cycle does the level of luteinizing hormone (LH) surge, triggering ovulation?

Accepted Answer

The LH surge occurs during the mid-follicular phase (around day 14 in a 28-day cycle) and triggers the release of the mature egg from the ovary.

Question 10

In human females, the ovarian cycle typically lasts for how many days from the beginning of one menstrual period to the next?

Accepted Answer

The menstrual cycle in human females averages 28 days, though it can range from 21 to 35 days, with ovulation typically occurring around day 14.

Question 11

During which phase of the menstrual cycle does the uterine lining (endometrium) thicken and prepare to receive a fertilized egg?

Accepted Answer

The proliferative phase occurs after menstruation, when rising estrogen levels stimulate endometrial thickening and gland development in preparation for potential implantation.

Question 12

If fertilization of a human egg does not occur within approximately how many hours after ovulation, the egg degenerates and cannot be fertilized?

Accepted Answer

An unfertilized human ovum remains viable for approximately 24 hours after ovulation; after this period, it degenerates and loses its ability to be fertilized.

Agniveer Army Clerk SKT Reproduction

Reproduction — Practice Questions