Eco system practice · Mixed difficulty

Blue whale, which inhabits Antarctica, has a requirement of more than a million calories per day. Which one of the following planktonic organisms forms the bulk of food to fulfill its caloric requirement?

A bear that eats a fish that further ate bugs that ate algae is a

What percentage of Herbivores chemical energy is transferred to the chemical energy within the carnivore tissue?

All of the following can be adaptations of xerophytes, except

In the given food chain, what will be the energy available to carnivore II?

Sunlight (100000 kcal) $\to$ Producer $\to$ Herbivore $\to$ Carnivore I $\to$ Carnivore II

The process of which humus is degraded by some microbes to release inorganic nutrients is known as

Primary succession on rocks starts with

The pioneer species on the bare rocks are?

Assertion: With time ecological succession can turn a lake into a dryland forest.

Reason: Through ecological succession a bare rock can become a forest.

Given below are two Statement : one is labelled as Assertion (A) and the other is labelled as Reason
(R)

Assertion (A): Despite occupying about 70percent of the surface, the productivity of oceans are only
55 billion tons.

Reason (R): In deep sea productivity is limited by light and nitrogen

In the light above statements, choose the most appropriate answer from the options given below.

In relation to decomposition, which one of the following statements is correct?

Assertion (A): Pyramid of biomass is inverted in aquatic ecosystem.

Reason (R): Longivity increases with the rise in trophic levels.

Which one of the following is a sedimentary cycle?

Which of the given is not seral community w.r.t. xerarch succession?
(A) Lichens (B) Bryophytes (C) Herbs (D) Forest

Mark the odd one out regarding trophic level of the organisms.

The pioneer community in xerarch succession is

The process by which a lake ecosystem is altered by eutrophication involves several stages, each causing the next. Which of the following stages would occur second in the chain of causation?

In ecological pyramid the base always represent the …A… and the apex represents …B… Here A and B represents

The species that invade a bare area in ecological succession are called

An individual transitional communities in ecological succession are termed as

Which of the following have sunken stomata?

Given below are two statements
Statement I: According to one estimate $4 \times 10^{13} \mathrm{~kg}$ of carbon is fixed annually in the biosphere through photosynthesis.
Statement II: Decomposers also contribute substaintially to $\mathrm{CO}_2$, pool by their processing of waste material and dead organic matter of land or oceans.
Choose the correct answer from the option given below:

Find the incorrect statement

Which one of the following is no used for construction of ecological pyramids?

Which one of the following is involved in sedimentary cycle?

Assertion: The number of species increases, the community biomass increases and the community's ratio of respiration to photosynthesis also increases. During an ecological succession.

Reason: The rate of photosynthesis of a community is almost equal to the rate of respiration, respiration, at climax community of an ecological succession.

Word detritus includes

The rate of formation of new organic matter by goat in a forest ecosystem is called