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Ecosystem

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Study the four statements (1-4) given below and select the two correct one out of them.
1. A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers
2.Predator starfish pisaster helps in maintaining species diversity of some invertebrates
3.Predators ultimately lead to the extinction of prey species
4.Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders
The two correct statements are 

  • (2) and (3)

  • (3) and (4)

  • (1) and (4)

  • (1) and (2)


D.

(1) and (2)

Both lion (carnivore) and sparrow (herbivore) and consumers. The Asteroidea occupy several important roles throughout ecology and biology. Sea stars, such as Ochre star (Pisaster ochraceous) have become widely known as the example of the keystone species concept in ecology. Most species are generalist predators, eating molluscs such as clams, oysters, etc.

Both lion (carnivore) and sparrow (herbivore) and consumers. The Asteroidea occupy several important roles throughout ecology and biology. Sea stars, such as Ochre star (Pisaster ochraceous) have become widely known as the example of the keystone species concept in ecology. Most species are generalist predators, eating molluscs such as clams, oysters, etc.


The green plants in the ecosystem-terminology are called :
  • Producers
  • Consumers
  • Herbivores
  • Carnivores

A.

Producers

What trophic level is occupied by the birds in an ecosystem ?
  • First
  • Second
  • Third
  • Fourth

C.

Third

The animals that feed on plants are called :
  • Producers 
  • Carnivores
  • Insectivores
  • Herbivores

D.

Herbivores

What trophic level is occupied by the Phytoplankton in an ecosystem ?
  • First
  • Second
  • Third
  • Fourth

A.

First

Cockroaches can feed both on plant and animal food, they are called :
  • Herbivores
  • Carnivores
  • Omnivores
  • None of the above

C.

Omnivores