GATE ES Ecology and various ecosystems PYQs & Answers

Questions 1–4 of 4. Imported answers require independent review unless marked reviewed.

A species whose impact on an ecosystem is disproportionately large in comparison to its population is called _____ species.

Your answerChoose one option.

dominant

keystone

apex predator

endemic

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Read the following statements

I. According to the Liebig’s law of minimum, the growth is regulated by the limited factors i.e., resources in scarcity and not by the resources in abundance.

II. Shelford’s law of tolerance states that, only the factors present in excess/abundance can affect the growth, development of an organism or rate of biological process.

III. Shelford’s law of tolerance states that, an organism's success is based on a complex set of conditions and that each organism has a certain minimum, maximum, and optimum levels of environmental factor or combination of factors that determine success.

The correct choice is

Your answerChoose one option.

I and II are correct; III is incorrect

I and II are correct; II is incorrect

II is correct; I and III are incorrect

III is correct; I and II are incorrect

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In context of ecosystems, which one of the following is NOT a correct statement?

Your answerChoose one option.

The growth of an organism such as a plant may be dependent on a number of different factors such as sunlight, mineral nutrients (nitrates, phosphates, etc.), etc. Liebig’s law states that, growth occurs at the rate permitted by the most limiting factor.

The carrying capacity of a population is determined by its limiting resources. Carrying capacity is the upper limit of an ecosystem up to which it can provide the basic needs to the population under given circumstances.

The Ramsar convention on lakes and backwater systems of International importance is an international treaty for the conservation and sustainable use of lakes and backwater systems. The treaty was signed in 1981 and became effective in 1985.

A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants and fungi.

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Carbon cycle, nitrogen cycle and phosphorus cycle play important role in the ecosystems. Which of the following statement(s) is/are NOT correct about the phosphorus cycle?

Your answerSelect all correct options. You can choose more than one.

Shortage of phosphorus can be a limiting factor in many ecosystems, however, its excess can stimulate eutrophication.

Organic phosphates exist in various rock and soil minerals.

Like carbon cycle, phosphorus also has a gaseous phase and can move into far away ecosystems.

Human interventions like application of phosphorus fertilizers cause much phosphorus to get into the ocean.

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GATE ES Ecology and various ecosystems PYQs

How to practice Ecology and various ecosystems

Question 24

Question 42

Question 26

Question 50