In a food chain, members of one trophic level are eaten by members of higher trophic level. A disease or scarcity due to drought that kills members of one trophic level, affects the population of both lower trophic level (very high number, glut) as well as higher trophic level (starvation and death). In a food web, one organism may occupy a position in more than one food chain. An organism can thus obtain its food from different sources and in turn, may be eaten up by different types of organisms.
1. What will happen if deer is missing from the food chain : grass → deer → tiger?
a. The population of tiger will increase
b. Tiger will start eating grass
c. The population of grass decrease
d. Population of tiger decrease and grass increases
2. The organisms of higher trophic level which feed on several types of organisms belonging to lower trophic level, constitute the __________.
a. food web
b. ecological pyramid
c. ecosystem
d. food chain
3. Which of the following constitute the food chain?
a. Grass, wheat and mango
b. Grass, goat and human
c. Goat, cow and elephant
d. Grass,fish, goat
4. Following is true for food web :
a. The energy available at each level gets diminished
b. Energy moves progressively through different levels
c. A and B
d. None of these
5. Levels in a food chain make a
a. Food web
b. Trophic level
c. Food level
d. None of these
