Ecosystem and Ecological Interactions

Q.

What are weeds?

Q. Why are there no predators for tigers and lions?

Q.

What type of relationship is exhibited by a mango tree and vanda?

1. Parasitism

2. Commensalism

3. Predation

4. Mutualism

Q.

The interaction between a flower and a butterfly is called

1. Predation

2. Mutualism

3. Parasitism

4. Competition

Q.

difference between selective and non selective herbicide

Q.

Given below are statements about the harmful effects of weeds on crop plants.

1. They interfere with harvesting.
2. They help crop plants to grow healthy.
3. They compete with crop plants for water, nutrients, space, and light.
4. They affect plant growth.

Choose the correct combination of statements.

1. i, iii and iv.

2. iii only

3. iii and iv

4. i, ii, iii, and iv.

Q. The ecological interaction where one species benefits and other is neither harmed nor benefited is called .

1. mutualism
2. commensalism
3. parasitism
4. predation

Q. What are cultural components of ecosystem

Q.

Which of the following interactions is shown between paddy plants and weeds?

1. Parasitism

2. Mutualism

3. Competition

4. Predation

Q.

The interaction between a flower and a butterfly is called

1. Parasitism

2. Mutualism

3. Predation

4. Competition

Q.

Which of the following statements describe commensalism?

1. World population day
2. No tobacco day
3. World environment day
4. World health day

Q. What are weeds? Why are they harmful to crops? [2 marks]

Q.

Unscramble each of the following to form a word or term that you have read in this chapter.

1. METNVIRONEN
2. BIAHATT
3. ILOS
4. COSEYEMTE
5. REPDAIONT

Q.

Lions, Jaguar, Tiger can all be called as

1. Producers

2. Predators

3. Herbivores

4. Decomposers

Q. An ________ is made of all the plants, animals and microorganisms in an area along with non-living components such as climate, soil, river deltas etc.

1. Desert
2. Environment
3. Ecosystem
4. None of these

Q.

Define predation.

Q.

How is commensalism different from mutualism?

Q. Match the types and nature of interactions between species A and B.
Beneficial: +
No effect : 0
Harmful : -

1. + for A and 0 for B
2. + for A and - for B
3. - for A and - for B
4. + for A and + for B

Q. ___________ is the functional system where the plants, animals and microorganisms in an area along with non-living components such as climate, soil, river deltas.

1. Ecosystem
2. Ecotone
3. Biome
4. Biosphere

Q. Meet went to a visit a forest where he saw that deer were hunted by tigers. This reminded him of different types of consumers. Which of the below options do you think is correct?

1. Deer- Herbivore; Tiger – Carnivore
2. Deer- Herbivore; Tiger – Omnivore
3. Deer- Omnivore; Tiger – Carnivore
4. Deer- Herbivore; Tiger – Decomposer

Q.

Deserts and grasslands are examples of

1. Community reserve

2. Ecosystem

3. Wildlife sanctuary

4. Trophic levels

Q.

Fill in the following blanks with suitable words:​

(g) The unwanted plants present in a crop field are called

Q. An ecosystem includes

1. all living organisms
2. non-living objects
3. both living organisms and non-living objects
4. sometimes living organisms and sometimes non-living objects

Q.

Choose the wrong option:

1. predation - one benefits and the other suffers

2. commensalism - one benefits and the other is unaffected

3. amensalism - one is harmed, other unaffected

4. mutualism - both species are harmed

Q.

What is an ecosystem?

Q.

The interaction between two organisms where one preys on the other is called

1. Commensalism

2. Mutualism

3. Parasitism

4. Predation

Q. An ________ is made of all the plants, animals and microorganisms in an area along with non-living components such as climate, soil, river deltas etc.

1. environment
2. ecosystem
3. diversity
4. none of these

Q.

Plants, animals, microbes, weather, soil and water are all components of a/an _____.

1. population
2. ecosystem
3. fauna
4. kingdom

Q. Can we say that geitonogamy and xenogamy are types of allogamy?

Q. ___________ is the functional system where the plants, animals and microorganisms in an area along with non-living components such as climate, soil, river deltas.

1. Ecosystem
2. Ecotone
3. Biome
4. Biosphere