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

Define fruit set.

  • Ans 1: Retention of the ovary which become fruit after the fertilization. Or it is the process in which ovary after fertilization start to develop in to fruit is called fruit set.
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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

Define fruit set.

  • Ans 1: Retention of the ovary which become fruit after the fertilization. Or it is the process in which ovary after fertilization start to develop in to fruit is called fruit set.
Submit

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

Question # 1

What is difference between oogenesis and spermetogensis in humans?

  • Ans 1: Oogenesis: In oogenesis, primary oocytes divide meiotically in to secondary oocytes and first polar body. Second meiotic division in the oocytes proceeds as far as metaphase but is not complete until the oocyte is fertilized by the sperm.
  • Ans 2: Spermatogenesis: during spermatogenesis primary spermatocytes under go meiotic division to form four secondary spermatocytes and spermatids which then differentiated into four mature sperms.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 3

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 4

Question # 1

How oestrous cycle different from menstrual cycle?

  • Ans 1: oestrous cycle: Oestrous cycle is a reproductive cycle found in all female mammals except human female. In this cycle, the estrogen production prepares the uterus for conception partly and also follicle develops ova. At this stage female needs a physical stimulus of mating for ovulation. She exhibits a desire for mating or is said to be on heat.
  • Ans 2: Menstrual Cycle: 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.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 5

Question # 1

Give two examples of short day plants.

  • Ans 1: Tobacco,Strawberry,Soybean are short day plants.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 6

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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Biology
18th Chapter

12th Class Biology Chapter 18 Short Questions

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