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

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

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Biology - 12th Class Biology Chapter 18 Short Questions Preparation

Question # 1

What is role of progestrone in pregnancy?

  • Ans 1: The end or complete stop of menstrual cycle is called menopause. After menopause female can't produce any more ovum or egg & can't give birth to any child.
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Prepare Complete Set Wise Questions For Chapter 4 "12th Class Biology Chapter 18 Short Questions Preparation "

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

Question # 1

What is role of progestrone in pregnancy?

  • Ans 1: The end or complete stop of menstrual cycle is called menopause. After menopause female can't produce any more ovum or egg & can't give birth to any child.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 2

Question # 1

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

Question # 1

What are phytochromes?

  • Ans 1: Phytochromes are blue light sensitive proteins found in plants. They exist in two form i.e,P660 andP730. They play an important role in photoperiodism.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 4

Question # 1

Differentiate between lactation and gestation.

  • Ans 1: Lactation: Lactation means discharge or production of milk from the mammary gland after child birth.
  • Ans 2: Gestation: Gestation is the total time period of pregnancy is called gestation. In human gestation period is of nine months.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 5

Question # 1

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.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 6

Question # 1

Differentiate between tissue culture and cloning.

  • Ans 1: Tissue Culture: It is the growth of a tissue or plant in an artificial growth culture medium under aseptic conditions.
  • Ans 2: Cloning: It is asexual reproduction in which genetically identical organisms are produced from a single species.
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12th Class Biology Chapter 18 Short Questions

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