Agronomy - Study Mode

[#981] Which one of the following is the characteristic of stripe rust of wheat
Correct Answer

(B) Yellow, small, spherical to oval ruptured uredo-pustules in rows of leaf

Explanation

Solution: Stripe rust of wheat is one of the types of rust disease in wheat crops. It is also called wheat yellow rust. It can cause significant loss to crop yield and its quality. In this disease elongated lesions are present on the infected area which bears yellow-orange spores, that is why it is called yellow rust.

[#982] CO 2 concentration in the atmosphere is about
Correct Answer

(A) 400 - 500 ppm

Explanation

Solution: The concentration of carbon dioxide in the earth's atmosphere is currently at nearly 400 - 500 parts per million (ppm). And because of the extreme rise in temperature because of global warming and pollution, the concentration of CO 2 keeps on rising.

[#983] The average concentration of CO 2 in the atmosphere is:
Correct Answer

(D) 421 ppm

Explanation

Solution: The concentration of carbon dioxide in the earth's atmosphere is currently 421 parts per million (ppm) in the May 2022. And because of the extreme rise in temperature because of global warming and pollution, the concentration of CO 2 keeps on rising.

[#984] The relationship between two organisms where one organism benefits but, the other is neutral (there is no harm or benefit) is known as
Correct Answer

(B) Commensalism

Explanation

Solution: The relationship between two organisms where one organism is benefitted while the other one is neutral neither benefitted nor harmed, that type of relationship is known as commensalism . While the mutual relationship where both the organism is benefitted is termed symbiosis .

[#985] Triple Response is associated with
Correct Answer

(D) Ethylene

Explanation

Solution: The triple response is the condition in plants that is triggered by the use of ethylene. It causes plants to have short roots, fat shoots, and increased lateral root growth, morphologically changes can be defined as inhibited root elongation, enhanced radial swelling and shortening of the hypocotyl.