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DSSSB TGT C9reproduction — practice questions

Explore 8 free C9reproduction questions in DSSSB TGT Science. Open each question or exercise to read its content, reference answers and available explanation.

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C9reproduction questions and exercises with answers

Showing questions 1–8 of 8.

Reproduction occurs in TWO MAIN MODES:Read the answer and worked solution →GRAFTING in horticulture is best described as:Read the answer and worked solution →POTATO reproduces VEGETATIVELY through which modified structure?Read the answer and worked solution →A village mould (Rhizopus) on stale bread spreads to nearby food via:Read the answer and worked solution →The MALE reproductive organ in a flowering plant is the:Read the answer and worked solution →POLLINATION is best described as:Read the answer and worked solution →After fertilisation in a flowering plant, the OVARY develops into the:Read the answer and worked solution →In human SEXUAL reproduction, FERTILISATION normally takes place in the:Read the answer and worked solution →

Worked practice questions

Reproduction occurs in TWO MAIN MODES:

  1. Internal and external reproduction modes
  2. Asexual (one parent) and sexual (two parents)
  3. Aerobic and anaerobic reproduction strategies
  4. Slow-growing and fast-growing reproduction methods
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Correct answer: B. Asexual (one parent) and sexual (two parents)

**Reproduction occurs in TWO modes:** asexual (one parent, identical offspring) and sexual (two parents, varied offspring). Most flowering plants do both. Asexual is fast; sexual creates variation needed for evolution.

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GRAFTING in horticulture is best described as:

  1. Burying a stem in soil while still attached to parent
  2. Cutting a stem and planting it as new plant
  3. Joining a desired-variety scion to a hardy root stock
  4. Inserting seeds into prepared soil at right depth
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Correct answer: C. Joining a desired-variety scion to a hardy root stock

**Grafting joins two plants:** the scion (desired upper part, e.g. sweet mango) is attached to a stock (hardy root system). The graft union heals over weeks. Used in mango, citrus, apple, rose to combine the best traits of two plants.

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POTATO reproduces VEGETATIVELY through which modified structure?

  1. Tuber, with each 'eye' being a bud
  2. Bulb, like onion's layered structure
  3. Rhizome, like ginger's underground stem
  4. Runner, like strawberry's above-ground stem
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Correct answer: A. Tuber, with each 'eye' being a bud

Potato uses TUBERS for vegetative propagation. Each 'eye' on the potato is a bud that grows into a new plant. Onion uses bulbs, ginger uses rhizomes, strawberry uses runners. All are asexual.

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