Tag: reproduction in plants and animals

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Questions Related to reproduction in plants and animals

Multiple choice biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

Testes of man occur 

  1. Inside body

  2. Upper side of body

  3. On either side of dorsal aorta

  4. In scrotal sacs
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Testes are the glandular glands that secrete hormone as well as produces male gametes. 
  • It is located in the scrotal sac, outside the body, because the process of spermatogenesis (sperm or male gamete production) requires a lower temperature i.e., 2-3${^0}$C lower than the normal body temperature. 
Multiple choice biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

The ................ is primary reproductive organ in male.

  1. Testis

  2. Ovary

  3. Breast

  4. Scrotum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The testes are a pair of ovoid glandular organs that are primary to the function of the male reproductive system. Its function is to produce sperm cells and the male sex hormone, testosterone.
So, the correct answer is option A.

Multiple choice biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

If the migration of testes does not take place in man, from abdominal cavity to scrotal sac, then

  1. Man will die.

  2. The development of male secondary sex character will not take place.

  3. The development of male reproductive system will not take place.

  4. The formation of sperms will not take place.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In mammals, the process of spermatogenesis or the formation of sperm requires a lower temperature than the normal body temperature to produce viable sperms. Hence, the sperms are stored outside the body in a sac-like structure called scrotum.
So, if the testes do not move from abdominal cavity to the scrotal sac, the sperms will not be formed.
Thus, the correct answer is option D.

Multiple choice biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

Testes produce male sex hormone

  1. Estrogen

  2. Testosterone

  3. Follicle stimulating hormone

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Testosterone is the hormone which is produced by testis of the human male. It is responsible for secondary sexual characters in male which includes deeper voice and hair on the chest, in addition to contributing to a healthy libido, building muscle mass, and maintaining energy levels.
Thus, the correct answer is option B.

Multiple choice biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

How many sperms take part in fusion with female gamete?

  1. Only one

  2. Two

  3. Millions in number

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The semen, secreted by male contains 100-200 millions of sperms. The healthy sperms in the semen then go to the cervix, then pass through the uterus and then ultimately arrive at the ampulla part of the fallopian tube where they come to meet the ovum. Although so many sperms encircle the ovum, only one sperm is allowed to penetrate the ovum.
Thus, the correct answer is option A.

Multiple choice biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

In mammals, the testes lie in the scrotal sacs due to the

  1. Presence of urinary bladder

  2. Presence of rectum

  3. Long vas-deferens

  4. Requirement of low temperature for sperm formation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The process of spermatogenesis or the formation of sperms require a lower temperature (1-6 degree C lower) than the normal body temperature to produce viable sperms. Hence, the sperms are stored outside in a sac-like structure called scrotum.
So, the correct answer is option D.

Multiple choice biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

Testes produce 

  1. Ovum

  2. Estrogen

  3. Sperm

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • The testes are the male gonad in the animals, produces sperm and the testosterone hormone and so is the primary male reproductive organ. 
  • Ovum is produced by the female reproductive organ, ovary, which is also responsible for the production of estrogen.

Thus, the correct answer is option C.

Multiple choice biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

Each ejaculate of a man contains about how many sperm?

  1. 200

  2. 2000

  3. 200,000

  4. 200,000,000
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The number of sperm in an ejaculation vary widely depending on the various factors like health, age, stress and also including the time since last ejaculation. A healthy adult man can release between 40 million and 1.2 billion of sperms in a single ejaculation. Counts below 10 million is considered poor and the counts of 20 million or more are considered fine. 
So, the correct option is D.
Multiple choice biology the reproductive system menstruation male reproductive system in humans male reproductive system reproduction in plants and animals

Which one is primary sex organ?

  1. Penis

  2. Scrotum

  3. Testis

  4. Prostrate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • The reproductive organs in each gender include a primary sex organ and several secondary sex organs. 
  • The primary sex organ is the one that produces the gametes of that sex i.e. the sperm or the ova. 
  • So, in the male, the primary sex organ is testis. In the female, the primary sex organ is the ovary.