Quiz 7
61) Which of the following is a system of drainage?
(A) Herringbone
(B) Gridiron
(C) Interceptor
(D) All of these
Correct Answer :All of these
62) In flaccid cell, the pressure potential is
(A) Zero
(B) 10
(C) 20
(D) 1
Correct Answer :Zero
63) Which of the following helps plant in reducing epidermal transpiration?
(A) Cutin
(B) Cuticle
(C) Cholesterol
(D) Cutin and Cuticle Both
Correct Answer :Cutin and Cuticle Both
64) Which bacterium is responsible for denitrification in N2 cycle?
(A) Nitrobactor
(B) Nitrosomones
(C) Rhizobium
(D) Bacillus subtilis
Correct Answer :Bacillus subtilis
65) There is decrease in the rate of transpiration due to
(A) Sunken stomata
(B) Thick cuticle stomata
(C) Waxy coating
(D) All of these
Correct Answer :All of these
66) To explain ascent of sap in plants, Sir J.C.Bose(1923) proposed
(A) Vital theory
(B) Physical force theory
(C) Root pressure theory
(D) All of these
Correct Answer :Vital theory
67) What is the effect of atmospheric pressure on transpiration?
(A) No effect
(B) It increase slowly
(C) It decreases fast
(D) All of these
Correct Answer :It increase slowly
68) Maximum density of water is at
(A) 100oC
(B) 0oC
(C) 4oC
(D) 62oC
Correct Answer :4oC
69) Water absorption through roots increases when
(A) Salt absorption is less
(B) Rate of photosynthesis increases
(C) Transpiration increases
(D) None of these
Correct Answer :Transpiration increases
70) Which of the following crop does not belong to solanaceae?
(A) Potato
(B) Tobacco
(C) Brinjal
(D) Sugar beet
Correct Answer :Sugar beet
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Agronomy is a science that looks at agriculture from an integrated, holistic perspective, informing practical decisions pertaining to food and fiber production. Agronomy requires integration of many sciences, and collaborations among many diverse fields, including soil, plant, and weed sciences, as well as the disciplines such as ecology, entomology, climatology, and economics. Effective crop production methods are grounded in scientific research and thus are by nature continually evolving and improving.
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