Plant Anatomy And Physiology - Study Mode

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[#481] The hard seed coat may be responsible for dormancy by

(A) Preventing gaseous exchange

(B) Preventing the absorption of water

(C) Mechanically restricting the growth of the embryo

(D) All of the above

Correct Answer

(D) All of the above

[#482] The most efficient devernaIizing factor, however, is

(A) Water

(B) High temperature

(C) Light

(D) Air pressure

Correct Answer

(B) High temperature

[#483] In some places very small units of various types of vegetation occur repeatedly which are caused by changes in the environment. Those small units are called

(A) Biomes

(B) Microstands

(C) Niches

(D) None of the above

Correct Answer

(B) Microstands

[#484] Match List-I with List-II and select the correct answer: List-I List-II a. Legume 1. A dehiscent dry fruit produced from a monocarpellary, superior ovary which dehisces from one suture only b. Follicle 2. A dehiscent dry fruit produced from a bicarpellary, syncarpous, superior ovary which is unilocular but appears bilocular due to false septum c. Siliqua 3. A dehiscent fruit produced from a monocarpellary, superior ovary which dehisces from both the sutures into two valves d. Capsule 4. A dehiscent dry fruit produced from syncarpous, superior or inferior ovary which dehisces along two or more lines of suture in various ways

(A) a-2, b-1, c-4, d-3

(B) a-3, b-1, c-2, d-4

(C) a-3, b-2, c-4, d-1

(D) a-2, b-1, c-3, d-4

Correct Answer

(B) a-3, b-1, c-2, d-4

[#485] The loose smut of wheat is a

(A) Localised disease

(B) Permanent disease

(C) Systemic disease

(D) None of the above

Correct Answer

(C) Systemic disease