Question

There are four organisms A, B, C and D. The organism A eats only the flesh of other animals as food. The organism B can eat grains, fruits and vegetables as well as meat and fish. The organism C can make the food itself from simple inorganic substances present in the environment by utilising sunlight energy. On the other hand, organism D eats only plants and their products as food.

1. Which organism is (i) omnivore (ii) herbivore, and (ii) carnivore?
2. Which organism is an autotroph?
3. Which organism is/are heterotroph(s)?
4. Which organism can be a producer?
5. Which organism is/are consumer (s)?
6. Give one example each of organisms which could be like (i) A, (ii) B, (iii) C, and (iv) D

Answer 1

(a)

1. Omnivore: Organism B
2. Herbivore: Organism D
3. Carnivore: Organism A 

(b) Organism C is an autotroph. It synthesizes its own organic food from simple inorganic substances using solar energy via photosynthesis.

(c) The organisms A, B and D are heterotrophs as they obtain food from other organisms and cannot synthesise their own food.

(d) Organism C is a producer. Because it creates its own food using sunlight, it forms the foundational source of energy (organic matter) for an ecosystem.

(e) The organisms A, B, and D are consumers. They must consume other living organisms (plants or animals) to obtain energy.

(f)

1. Organism A (Carnivore): Lion, Tiger, or Lizard.
2. Organism B (Omnivore): Human, Bear, or Crow.
3. Organism C (Producer/Autotroph): Green grass, Neem tree, or Algae.
4. Organism D (Herbivore): Cow, Deer, or Rabbit.