Question

Mycorrhizae are the mutualistic partnership between fungi and the roots of certain plants. TRUE OR FALSE

Which of the following is not a greenhouse gas?

• carbon dioxide (CO₂₎

• sulfur dioxide (SO₂)

• methane (CH₄)

• ammonia (NH₄⁺)

• All of these choices are correct.

Bacillus thuringiensis produces

• a toxin that causes food poisoning.

• a biopesticide.

• enzymes used in cheese-making.

• a single cell protein used as food.

• All of these choices are correct.

Hops is the herb that gives beer some of its aroma and flavor. TRUE OR FALSE

Answer 1

Mycorrhizae is a form of symbiotic relationship or mutualistic relationship between the roots of plants and fungi. Plants from the carbohydrates and provide them to the fungi. Fungi, in turn, provides water and minerals to the plants. Both are getting benefit of each other. Therefore this statement is True .

A greenhouse gas is a gas which absorbs and radiate the radiant heat. Main greenhouse gases are carbon dioxide, nitrous oxide, chlorofluorocarbons, methane, sulfur dioxide, etc. Ammonia is not considered a greenhouse gas because it is very short lived that it has global warming potential of zero. Answer is Ammonia.

Bacillus thuringiensis a naturally occurring soil borne bacteria. It is widely used as a biopesticide. It produces enterotoxin which cause food poisoning. It secrete enzymes which help in formation of cheese. Its secretes some proteins which can be used as food. Answer is all of the above.

Hops (homulus lopulus) is a herb which is used to impart aroma, bitterness, stability and flavour to the beer. Answer is True.