1.
All living things interact with one another all the time.
2.
Environment has two components.
3.
All plants, animals and micro-organisms are called living or biotic components of an environment.
4.
Mutualism is a relationship in which two living organisms live together and depend on each other.
5.
Mutualism occurs among some plants and animals.
6.
Algae and fungi form lichen.
7.
Green algae makes food for itself and for the fungus.
8.
The termites are not able to digest the wood.
9.
Parasitism is a relationship between two living organisms in which one is harmed and other helped.
10.
A kind of unicellular organisms helps termites to digest the wood.
11.
The relationship between predator and prey is called predation.
12.
The living organism on which the parasite feeds is called the host.
13.
Many plants and animals are parasites.
14.
A mosquito is a parasite.
15.
Cuscuta is a parasitic plant.
16.
Organisms in an environment interact with one another to obtain food and shelter.
17.
The amount of rainfall throughout the year determines the amount of water available at any place.
18.
A large number of plant and animals is from the tropical rainforests because of heavy rainfalls.
19.
There is a system of give and take between biotic and abiotic components of the environment.
20.
Very few plants and animals are found in deserts because of less rainfall.
21.
Abiotic or physical environment means non-living environment.
22.
Water lily and hydrilla are plants which are found in water.
23.
Cactus is a desert plant.
24.
Plants cannot make their own food without carbon dioxide gas.
25.
Animals release carbon dioxide during respiration.
26.
Plants absorb carbon dioxide from air.
27.
Plants provide animals shade and also make the surroundings cool.
28.
All animals depends directly or indirectly on green plants from their food.
29.
Decomposers break down complex substances into simple ones.
30.
Bacteria and fungi are called decomposers.
31.
When plants and animals die their bodies are decomposed by bacteria and fungi.
32.
Animals that eat only plants are called herbivores.
33.
Producers release oxygen in which all organisms respire.
34.
Plants are able to make their own food be photosynthesis.
35.
Most of the interactions among organisms involve food.
36.
Only green plants can make food.
37.
Plants, animals and micro-organisms are biotic components of the environment.
38.
Omnivorous are the animals that can eat both plants and animals.

39.
Plants are able to make their own food by photosynthesis and are known as producers in the food chain.
40.
Plants, animals and micro-organisms in an environment. biotic
41.
Bacteria and fungi are examples of decomposers.
42.
A living thing that lives on or in another living thing and harms it parasite.
43.
The animals which can eat both plants and animals omnivores.
44.
An animal that is killed by a predator prey.
45.
A relationship between two kinds of organisms in which both benefits mutualism.
46.
An abiotic component of an environment is: a.
A plant b. An animal c. water d. a micro-organism
47.
A pine tree is a: a.
Predator b. producer c. consumer d. parasite
48.
Organisms that feed on plant directly or indirectly are called: a.
Producers b. predators c. prey d. consumers
49.
What kind of organisms help clean a place of waste and dead remains? a.
Decomposers b. carnivores c. herbivores d. omnivores
50.
Which is an example of parasitism? a.
Two species of insects that feed on the same rare plant b.
A lake near a forest in northern areas c.
An African lioness feeding her cubs d.
A tick long on a dog.