These questions are based on class 12 biology book chapter 14
1. Identify the true statements regarding trophic levels in a food chain
a. Theoretically the number of trophic levels in a food chain can be unlimited
b. A given species may occupy more than one trophic level
c. In each successive trophic level the energy increases
2. Identify the correct statements regarding biomass pyramids
a. The pyramid of biomass in grassland is generally upright
b. The pyramid of biomass in sea is generally inverted
c. In most ecosystems, all the pyramids of number, energy and biomass are always upright
d. Pyramid of energy is always upright, can never be inverted
3. In an ecological succession pioneer species represent
a. The species which is most important
b. The species which appears first
c. The species which is in great number
4. In an ecological succession climax community represents
a. Beyond which no more succession takes place
b. A community having many species
c. A community having more biomass productivity
5. All ecological succession whether taking place in water or on land, proceeds to a similar climax community that is
a. Lichens
b. Phytoplankton
c. Zooplankton
d. Forests
1.b
ReplyDelete2.?
3.all
4.all
1.b
Delete2.a,b (bio mass pyramids is imp, please read it)
3.ecological succession is imp concept. last year prelims there was a question. So please read it. ans is
pioneer species=first species and climax community=last species. its two ends of a continuum
4.a
5.d
(given a long enough time a lake can be converted into forest! thats what it means)