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CBSE Class 9 Diversity in Living Organisms — practice questions — page 2

Explore 132 free Diversity in Living Organisms questions in CBSE Class 9 Science. Open each question or exercise to read its content, reference answers and available explanation.

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Diversity in Living Organisms questions and exercises with answers

Showing questions 31–60 of 132.

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 →The FIVE-KINGDOM classification system was proposed in 1969 by:Read the answer and worked solution →BACTERIA belong to which kingdom?Read the answer and worked solution →AMOEBA, PARAMECIUM, and EUGLENA are all members of:Read the answer and worked solution →The CELL WALL of fungi is made of:Read the answer and worked solution →A MANGO tree is classified as a:Read the answer and worked solution →Match the kingdom to a defining featureRead the answer and worked solution →Rocks, soil and landforms make up the:Read the answer and worked solution →Liquid water on the Earth forms the:Read the answer and worked solution →Ice and snow make up the:Read the answer and worked solution →All living organisms and their habitats form the:Read the answer and worked solution →The main source of energy on the Earth is:Read the answer and worked solution →Which radiation reaches the surface and drives photosynthesis?Read the answer and worked solution →Solar radiation reaching the Earth's surface is called:Read the answer and worked solution →The solar constant is about:Read the answer and worked solution →The fraction of sunlight a surface reflects is its:Read the answer and worked solution →Which surface has a high albedo?Read the answer and worked solution →The atmosphere consists mainly of nitrogen and:Read the answer and worked solution →Nitrogen makes up what share of the atmosphere?Read the answer and worked solution →Which layer shields the Earth from harmful UV radiation?Read the answer and worked solution →Gases that trap outgoing heat are called:Read the answer and worked solution →Rising air at the equator forms a belt of:Read the answer and worked solution →Sinking air near 30 degrees latitude forms: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
Show answer and solution

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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