Pyramid of Biomass in Terrestrial Ecosystems

Q.

Which ecosystem has the highest productivity?

Q. Which of the following ecosystem can be included in least productive category?

1. Coral reef
2. Desert
3. Tropical rain forest
4. Sugarcane field

Q. Which ecosystem among these has the highest Gross Primary Productivity (GPP)?

1. Deserts
2. Coral reefs
3. Mangroves
4. Grasslands

Q. Which of the following exhibits least productivity?

1. Open oceans
2. Grasslands
3. Coral reefs
4. Estuaries

Q. For tree and grassland ecosystems, pyramid of biomass is

1. upright
2. inverted
3. spindle-shaped
4. urn-shaped

Q. Which of the following ecosystem can be included in least productive category?

1. Coral reef
2. Desert
3. Tropical rain forest
4. Sugarcane field

Q. Biomass pyramid for a tree ecosystem will be

1. upright
2. inverted
3. spindle shaped
4. both (b) and (c) are possible

Q. What is at the bottom of a biomass pyramid?

1. Tertiary consumers
2. Decomposers
3. Producers
4. Primary consumers

Q. Biotic potential refers to

1. Increase of population under given conditions
2. Increase of population under optimum environmental conditions
3. Increase of population under natural conditions
4. Increase of population under climatic conditions

Q. Assertion: An ecosystem with more variety of species shows higher productivity.
Reason: It allows invasion of alien species.

1. Assertion and reason are true, and the reason is the correct explanation of the assertion
2. Assertion and reason are true, and the reason is not the correct explanation of the assertion
3. Assertion is a true statement but the reason is false
4. Assertion and reason are false statements

Q. Standing crop is

1. All crop plants in an area
2. Dried biomass of all living organisms in the given environment
3. None of the above
4. All photosynthetic living forms of an area

Q.

In grassland ecosystem, the pyramid of biomass is

1. spindle shaped

2. none of these

3. upright

4. inverted

Q.

Why there is low primary productivity in oceans than on land?

Q. The last step of biogas formation is

1. Acidogenesis
2. Methanogenesis
3. Hydrolysis of organic substances
4. Solubilization of organic substances

Q. Biomass not only gives an idea of the mass but also of the sample size at each

1. food chain
2. All of the above
3. trophic level
4. food web

Q. Mass of living matter at a trophic level in an at any time is called as

1. Standing crop
2. Detritus
3. Humus
4. Standing state

Q. All parts of land plants cannot be eaten by herbivores.

1. True
2. False