Interdependence Amongst Living Organisms Class-8th Goyal Brothers Biology Solutions

Interdependence Amongst Living Organisms Class-8th Goyal Brothers ICSE Biology Solutions Chapter-3 (Ecosystem), Unit-4. We Provide Step by Step Answer of Objective,  Fill in the blanks , Definitions , Match the followings and Short/Long Question Type answers of Chapter-3, Unit 4, Interdependence Amongst Living Organisms.. Visit official Website  CISCE  for detail information about ICSE Board Class-8.

Interdependence Amongst Living Organisms ICSE Class-8th Goyal Brothers

Biology Solutions Chapter-3,Unit-4

Board ICSE
Class 8th
Subject Biology
Book Name Goyal Brothers
Chapter-3 Ecosystem
Unit-4 Interdependence Amongst Living Organisms
Topic Solution of exercise questions
Session 2023-24

 

Interdependence Amongst Living Organisms

ICSE Class-8th Goyal Brothers

I. Fill In The Blanks:

  1. Air contains _0.03_ percent carbon dioxide.
  2. Increase in Carbon Dioxide concentration in the atmosphere leads to _Global Warming_.
  3. The air in motion is called _Wind_.
  4. Only 2.7 percent of water is _Fresh water_.
  5. The Uppermost layer of earth’s crust is called_ lithosphere_.
  6. The Process of soil formation is termed _Weathering_.
  7. Humus is rich in _Organic Matter_.

II. Define the following, giving two examples of each:

1. Symbiosis: It is defined as the living together of two (or more) organisms of different species in an intimate(close) association, in which both partners benefit.

For example :- Association of a fungus with the roots of a higher plants.

2. Predation: Predation refers to an interaction between species in which one species, the predator, kills and eats the other, called prey.

For example :- Locust insect(predator) destroys the seed crop (prey).

3. Parasite: An organism(parasite) which depends on another organism(host) for its existence. The parasite depends on the host for food.

For example:- Plants are parasitised by bacteria , Fungi, Viruses etc .

III. Match the items in column :

Column A Column B
1.Symbiosis (a) One organism depend on the other organism for food, but the second organism gets no benefit.
2.Parasite (b) Interaction between the species, in which one kills and eats the other.
3.Predation (C) Organisms of two different species living together, with mutual benefit.

Ans:-

  • 1(c)
  • 2(a)
  • 3(b)

IV. Answer the following questions:

Question 1:- Name the type of association found in lichens.

Answer:- Symbiosis is the type of association found in lichens.

Question 2:- Name one ectoparasite and one endoparasite.

Answer:- Parasite living outside the host body is known as ectoparasite. Example Lice.

Parasite living inside the host body is known as endoparasite. Example Tapeworm and Malaria parasite.

Question 3:- Name a plant parasite.

Answer:- Cuscata is a plant parasite.

Question 4:- Name three abiotic factors of an ecosystem

Answer:- The three abiotic factors of an ecosystem are Temperature, light and water.

Question 5:- Write in brief about the abiotic components of an ecosystem.

Answer:-The abiotic components of the ecosystem are:-

  • Inorganic Nutrients, such as carbon dioxide, Oxygen, nitrogen, water and minerals.
  • Organic Compounds, such as protein, carbohydrates, fats etc. Present in the dead remains of plants and animals, and found in the soil.
  • Climatic Factors, such as light, temperature, rainfall, and humidity.

— : end of Interdependence Amongst Living Organisms Class-8th Goyal Brothers:–

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