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CBSE Class 9 Diversity in Living Organisms — practice questions

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 1–30 of 132.

In ASEXUAL reproduction, how many parents are involved?Read the answer and worked solution →In SEXUAL reproduction, the offspring inherit:Read the answer and worked solution →A small outgrowth on the parent body that develops into a new individual (seen in Hydra and yeast) is called:Read the answer and worked solution →Vegetative propagation in plants is an example of:Read the answer and worked solution →In humans, how many chromosomes does each NORMAL body cell contain?Read the answer and worked solution →In humans, the female gamete is called the ___ and the male gamete is called the ___:Read the answer and worked solution →Fungi (like Rhizopus and Aspergillus) reproduce asexually by producing:Read the answer and worked solution →The variety of living organisms — from microscopic algae to giant trees, on land and in oceans — is called:Read the answer and worked solution →The process of grouping organisms into categories based on shared characteristics is called:Read the answer and worked solution →Microscopic algae in the oceans contribute to life on Earth by:Read the answer and worked solution →As per your syllabus, the NECK joint (connecting skull to backbone) allows side-to-side 'no' head movement — it is which type?Read the answer and worked solution →As per your syllabus, the joints between the BONES OF THE SKULL are which type?Read the answer and worked solution →As per your syllabus, how many PAIRS of RIBS does an adult human have?Read the answer and worked solution →As per your syllabus, the rib cage attaches to the spine at the back and to which bone at the front?Read the answer and worked solution →As per your syllabus, what percentage of TOTAL BODY WEIGHT is contributed by the adult human SKELETON on average?Read the answer and worked solution →As per your syllabus, which of these is a global BIODIVERSITY HOTSPOT located in India (As per your syllabus, )?Read the answer and worked solution →As per your syllabus, which Indian endemic plant is the 'pitcher plant' species found only in India?Read the answer and worked solution →As per your syllabus, who introduced the BINOMIAL system of nomenclature in the 18th century?Read the answer and worked solution →As per your syllabus, which is the CORRECTLY written scientific name of the tiger?Read the answer and worked solution →As per your syllabus, what is the SCIENTIFIC NAME for the mango — as given in Table 12.3?Read the answer and worked solution →As per your syllabus, Science, who in the 4th century BCE first grouped animals by HABITAT (land, water, air)?Read the answer and worked solution →As per your syllabus, which kingdom contains UNICELLULAR PROKARYOTES (organisms without a true nucleus)?Read the answer and worked solution →As per your syllabus, which fungus is used to make ENZYMES + ANTIBIOTICS — including the antibiotic-producing genus?Read the answer and worked solution →As per your syllabus, who proposed the THREE DOMAIN system (Bacteria, Archaea, Eukarya) in 1977 — using DNA-based comparisons?Read the answer and worked solution →As per your syllabus, which plant group is the MOST DIVERSE plant group on Earth — occupying the widest range of environments?Read the answer and worked solution →As per your syllabus, which phylum is the FLATWORM group — characterised by BILATERAL SYMMETRY and directional movement?Read the answer and worked solution →As per your syllabus, which phylum consists of ROUNDWORMS — featuring a tube-like body with TWO openings (mouth and anus)?Read the answer and worked solution →As per your syllabus, which phylum consists of SEGMENTED worms (e.g. earthworm) — showing body segmentation and a true body cavity?Read the answer and worked solution →As per your syllabus, which phylum has SOFT bodies with organ-system organisation — typically with a shell (e.g. snails, octopus)?Read the answer and worked solution →As per your syllabus, which phylum has SPINY skinned animals with internal calcareous support — e.g. starfish, sea urchins?Read the answer and worked solution →

Worked practice questions

In ASEXUAL reproduction, how many parents are involved?

  1. Two
  2. Zero
  3. One
  4. Three or more
Show answer and solution

Correct answer: C. One

Asexual reproduction involves a single parent only. The offspring are produced from a part of the parent body (or from a single cell) and are genetically (almost) identical to the parent — clones.

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In SEXUAL reproduction, the offspring inherit:

  1. Genetic material from neighbours
  2. Genetic material from both parents — leading to genetic variation
  3. Genetic material from one parent only
  4. No genetic material
Show answer and solution

Correct answer: B. Genetic material from both parents — leading to genetic variation

Sexual reproduction combines genetic material (chromosomes) from both parents — male and female gametes fuse to form a zygote. Offspring share characters from both parents, and the recombination creates genetic variation across the population.

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A small outgrowth on the parent body that develops into a new individual (seen in Hydra and yeast) is called:

  1. Zygote
  2. Spore
  3. Bud
  4. Seed
Show answer and solution

Correct answer: C. Bud

In budding, a bud develops on the parent body (or in a single cell like yeast). The bud grows, then separates to become an independent organism. Hydra and yeast both reproduce by budding.

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