Which one of the following is the correct sequence of ecosystems in the orderof decreasing productivity?

Improper handling and storage of cereal grains and oilseeds result in the production of toxins known as aflatoxins which are not generally destroyed by normal cooking process. Aflatoxins are produced by

Due to improper/indiscriminate disposal of old and used computers or theirparts, which of the following are released into the environment as e-waste?

1. Beryllium 2. Cadmium 3. Chromium 4. Heptachlor 5. Mercury 6. Lead 7. Plutonium

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Acid rain is caused by the pollution of environment by

With reference to food chains. In ecosystems, consider the following statements:

1. A food chain illustrates the order in which a chain of organisms feed upon each other.

2. Food chains are found within the populations of a species.

3. A food chain illustrates the numbers of each organism which are eaten by others.

Which of the statements given above is/are correct?

Consider the following organisms:

1. Agaricus 2. Nostoc 3. spirogyra

Which of the above is/are used as biofertilizer/biofertilizers?

Which of the following diseases can be transmitted from one person to another through tattooing?

1. Chikungunya 2. Hepatitis B 3. HIV-AIDS

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Which one of the following terms describes not only the physical spaceoccupied by an organism, but also its functional role in the community of organisms?

Consider the following minerals:

1. Calcium

2. Iron

3. Sodium

Which of the minerals given above is/are required by human body for the concentration of muscles?

With reference to the food chains in ecosystems, which of the following kinds of organism is / are known as decomposer organism / organisms?

1. Virus 2. Fungi 3. Bacteria

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The most important fishing grounds of the world are found in the regions where

Which one among the following industries is the maximum consumer of water in India?

Fruits stored in a cold chamber exhibit longer storage life because

Ball bearings are used in bicycles, cars, etc., because

Consider the following phenomena

1. Size of the sum at dusk

2. Colure of the sun at dawn

3. Moon being visible at dawn

4. Twinkle of stars in the sky

5. Polestar being visible in the sky

Which of the above are optical illusions?ppppppp