Introduction to Ecosystem structure

Q.

Which one of the following is a characteristic feature of cropland ecosystem?

1. Absence of weeds
2. Absence of soil organisms
3. Ecological succession
4. Least genetic diversity

Q.

Do Millipedes eat detritus?

Q.

A rat feeding on a potato tuber, shows what trophic level?

Q. Which of the following statements about ecosystems is false?

1. Ecosystems involve an interaction between both living and nonliving components.
2. Ecosystems are dynamic.
3. Ecosystems are shaped by the activities of the organisms that inhabit them.
4. Ecosystems are made up of only inorganic materials.

Q. If decomposers are removed what will happen to the ecosystem?

1. Energy cycle is stopped
   
2. Rate of decomposition of mineral increases
3. Mineral cycle is stopped
4. Consumers cannot absorb solar energy

Q. The dead remains of plants and animals are the major source of energy for ___.

1. Herbivores
2. Tertiary consumers
3. Saprotrophs
4. Autotrophs

Q. A Bamboo plant is growing in a far-off forest, then what will be the trophic level of it :

1. First trophic level $\left(T_1\right)$
2. Second trophic level $\left(T_2\right)$
3. Third trophic level $\left(T_3\right)$
4. Fourth trophic level $\left(T_4\right)$

Q. ___are organisms which break up dead plant and animal remains into organic and inorganic matter.

Q. Which one of the following is a characteristic feature of cropland ecosystem?

1. Absence of soil organisms
2. Least genetic diversity
3. Absence of weeds
4. Ecological succession

Q. Which of the following is not a structural aspect of an ecosystem?

1. Species composition
2. Diversity
3. Stratification
4. Productivity

Q. Which of the following is an abiotic factor in an aquatic ecosystem?

1. Phytoplankton
2. Hydra
3. Microbes
4. Temperature

Q. Which of the following is an abiotic factor in an aquatic ecosystem?

1. Phytoplankton
2. Hydra
3. Microbes
4. Temperature

Q. In an ecosystem, those carnivores which generally do not get preyed upon by predators are known as “top carnivores”.

1. True
2. False

Q. Choose the correct pairs:

1. Producers
2. Fungi
3. Herbivores
4. Decomposers
5. Phytoplanktons
6. Elephants