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Diversity in Living Organisms

9th Class (CBSE) Science: Diversity in Living Organisms

Question: Who wrote the book “The Origin of Species”?

Answer: Charles Darwin in 1859.

Question: Who proposed the classification of organisms into 5 kingdom?

Answer: Robert Whittaker (1959).

Question: Define species.

Answer: All organisms that are similar to breed and perpetuate.

Question: Give example of the organism belonging to Monera and Protista Kingdom.

Answer: Monera—Anabaena, blue-green algae, Protista—Eugleno, Paramecium, Amoeba

Question: Name the appendages used for movement by organism belonging to Protista kingdom.


  1. Paramecium – Cilia
  2. Euglena – Flagella
  3. Amoeba – Pseudopodia

Question: What is lichen?

Answer: The symbiotic association of fungi and blue-green algae is called lichen.

Question: What is symbiotic relationship?

Answer: It is a relationship between two organisms in which both of them are benefitted, e.g., fungi gets food from blue-green algae and in return blue-green gets shelter [lichens].

Question: What is saprophytic nutrition?

Answer: The organisms using dead and decaying organic matter as food are said to show saprophytic nutrition.

Question: Name the plant amphibian.

Answer: Biyophyta e.g. Funaria (Moss).

Question: What are cryptogamae?

Answer: The plants with inconspicuous reproductive organs are called cryptogamae, e.g. fern.

Question: Give examples of pteridophyte.

Answer: Marsilea and Fern.

Question: Name the reproductive organ of plants.

Answer: Flower.

Question: What are gymnosperms?

Answer: The group of plants that bear naked seeds e.g., pines, deodar.

Question: What are angiosperms?

Answer: The group of plants with covered seeds are called angiosperms. These are flowering plants.

Question: What are cotyledons?

Answer: Plant embryos in seeds have structures called cotyledons. Cotyledens are also known as seed leaves.

Question: Name the phylum of an animals with pores on it.

Answer: Porifera e.g., sponge.

Question: Name the phylum of Jellyfish

Answer: Coelenterata or Cnidaria.

Question: What is the meaning of triploblastic?

Answer: Animals which have three layers of cells from which differentiated tissues -can be made.

Question: What is bilateral symmetry?

Answer: When the left and right halves of the body have same design it is called bilateral symmetry.

Question: What is the meaning of “cold-blooded animal”?

Answer: Those animals who show the variation in their body temperature according to the surroundings are called cold-blooded animals, e.g., fish, amphibians, reptiles.

Question: Name two mammals that lay eggs.

Answer: Platypus and echidna.

Question: Name three mammals that live in water.

Answer: Whale, platypus and Dolphins.

Question: Name a fish with skeleton made up of cartilage.

Answer: Shark.

Question: Name two fish which have skeleton made up of both bone and cartilage.

Answer: Tuna and rohu.

Question: Name the reptile with four-chambered heart.

Answer: Crocodile.

Question: Why do we classify organisms?

Answer: For easier and convenient study we classify organisms.

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