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 vernalization?

  • Ans 1: Biennials and perennials plants are stimulated to flower by exposure to low temperature. This is called vernalization. Duration of low temperature (chilling) treatment required varies from four days to three months.Temperature around 4oC is found to be very effective.
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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 vernalization?

  • Ans 1: Biennials and perennials plants are stimulated to flower by exposure to low temperature. This is called vernalization. Duration of low temperature (chilling) treatment required varies from four days to three months.Temperature around 4oC is found to be very effective.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 2

Question # 1

How seedless fruit are formed?

  • Ans 1: Seedless fruit are also called parthenocapic fruits they formed without fertilization. It may be formed naturally as in banana and may formed artificially like seedless grapes.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 3

Question # 1

What is Gonorrhoa and who caused it?

  • Ans 1: It is caused by a gram positive bacterium Neisseria gonorrhoeae,mainly affecting the mucous membrane of urinogenital tract. New born infants may acquire serious eye infections if they pass through the infected birth canal.It is highly contagious through sexual contacts.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 4

Question # 1

Differentiate the internal and external fertilization.

  • Ans 1: External Fertilization:Fertilization which occurs outside the body is know as external fertilization.
    It occurs aquatic environment where male gametes can swin towards females gametes in water medium.
  • Ans 2: Internal Fertilization: Fertilization which occurs inside the body of organisms is known as internal fertilization.
    Sperms are lodged in the female body where fertilization occurs.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 5

Question # 1

Define Ovulation.

  • Ans 1: Discharge of ovum from the ovary is called ovulation.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 6

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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18th Chapter

12th Class Biology Chapter 18 Short Questions

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