Find the Second Year Biology Chapter 18 Short Questions Online Preparation (Reproduction)

Question # 1

What is diploid parthenogenesis?

Ans 1: In diploid partenogenesis a diploid egg is formed due to non disjunction of chromosomes, they retain their diploid number of chromosomes; diploid egg then develops in to young female.

Question # 2

Define terms menstruation and menopause.

Ans 1: Menstrual cycle:In human females the periodic reproductive cycle is completed in approximately 28 days and involves changes in the structure and function of the whole reproductive system. It is called menstrual cycle.
Ans 2: Menopause:The end or complete stop of menstrual cycle is called menopause

Question # 3

Define gonorrhea and AIDS.

Ans 1: Gonorrhea is caused by gram positive bacteria called Neisseria gonorrhoeae,mainly affecting the mucous membrane of urinogenital tract. New born infants may acquire serious eye infection if they pass through infected birth canal. It is highly contagious through sexual contact.
Ans 2: AIDS:It is caused by AIDS virus (acquired immune deficiency virus) mainly destroy the WBCs (Iymphocytes) so immune system becomes weak. It is also transmitted from infected person through sexual contact.

Question # 4

Give importance of photoperiodism in plants.

Ans 1: Photoperiodism plays an important role in flowering of plants in long and short day plants.

Question # 5

What is Apomixes? Or What is meant by Apomixes?

Ans 1: In apomixes a diploid cell either from the nucellus or megaspore develops into a functional embryo in the absence of a male gamete. The rest of the ovule develops into seed and ovary into fruit.

Question # 6

State two methods of asexual reproduction in animals.

Ans 1: Binary fission is a method of asexual reproduction in which animals like amoeba. During binary fission nucleus elongates and then divides into two nuclei, at the same time cytoplasm divides and two daughter cells are formed.
Ans 2: Regeneration is another method of asexual reproduction in which missing part of the body which is separated from the main body part develops into a complete organism.

Question # 7

Define reproduction.What is its significance?

Ans 1: Process in which living organism produced their new generation like to themselves is called reproduction.
Ans 2: It ensures the survival of species.

Question # 8

What are functions of sertoli cells?

Ans 1: Fluid secreted by sertoli cells provides liquid medium, protection and nourishment to sperms while they are in tubules.

Question # 9

Differentiate identical twins and triplets.

Ans 1: Identical twins: If new born organisms are the product of mitosis and they have same genetic makeup, they are called identical twins.
Ans 2: Identical Triplets: In some cases, more than one egg are produced by the female and all eggs are independently fertilized two or more zygote. These zygote develops into new offspring, but with different genetic combination. such twins or triplets are called fraternal twins or triplets. They are produced sexually.

Question # 10

Give the function of interstitial cells of testis.

Ans 1: Interstitial cells produce testosterone. This hormone is essential for the successful production of sperms.

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Second Year Biology Chapter 18 Short Questions Online Preparation (Reproduction)

Online Short Questions For Chapter 4 "12th Class Biology Chapter 18 Short Questions Preparation "

Biology - 12th Class Biology Chapter 18 Short Questions Preparation

What is diploid parthenogenesis?

Define terms menstruation and menopause.

Define gonorrhea and AIDS.

Give importance of photoperiodism in plants.

What is Apomixes? Or What is meant by Apomixes?

State two methods of asexual reproduction in animals.

Define reproduction.What is its significance?

What are functions of sertoli cells?

Differentiate identical twins and triplets.

Give the function of interstitial cells of testis.

Prepare Complete Set Wise Questions For Chapter 4 "12th Class Biology Chapter 18 Short Questions Preparation "

Set 1

Set 2

Set 3

Set 4

Set 5

Set 6

12th Class Biology Chapter 18 Short Questions Preparation - Set 1

What is diploid parthenogenesis?

Define terms menstruation and menopause.

Define gonorrhea and AIDS.

Give importance of photoperiodism in plants.

What is Apomixes? Or What is meant by Apomixes?

State two methods of asexual reproduction in animals.

Define reproduction.What is its significance?

What are functions of sertoli cells?

Differentiate identical twins and triplets.

Give the function of interstitial cells of testis.

12th Class Biology Chapter 18 Short Questions Preparation - Set 2

Apomixes is a form of parthenogenesis.Discuss

Why seed plants are predominantly present all around as?

Distinguish between vernalization and seed dormancy.

State two methods of asexual reproduction in animals.

Define parthenocarpy. How it is artificially induced?

What is genital herpes?

Define reproduction.What is its significance?

Define placenta. Give its function.

What are functions of sertoli cells?

Define photoperiodism.

12th Class Biology Chapter 18 Short Questions Preparation - Set 3

Give importance of photoperiodism in plants.

What are phytochromes?

What is oestrous cycle?

Name various parts of male reproductive system in male.

Define fruit set.

Differentiate between oviparous and viviparous.

What is role of progestrone in pregnancy?

Give the function of interstitial cells of testis.

Why seed plants are predominantly present all around as?

Define seed dormancy. Write its signifance. Give Its importance.

12th Class Biology Chapter 18 Short Questions Preparation - Set 4

Define Ovulation.

Define photoperiodism.

What is Gonorrhoa and who caused it?

Differentiate between oviparous and viviparous.

What is vernalization?

Give two disadvantages of cloning.

Give the role of oxytocin.

Define vernalisation. Give its one importance.

Differentiate the internal and external fertilization.

Differentiate between tissue culture and cloning.

12th Class Biology Chapter 18 Short Questions Preparation - Set 5

What is seed dormancy?

Enlist methods of asexual reproduction.

Give two examples of short day plants.

Name the hormones that stimulate mammary glands for lactation.

What are functions of sertoli cells?

How seedless fruit are formed?

What is corpus luteum? Give its function.

What is Gonorrhoa and who caused it?