Plant Anatomy And Physiology - Study Mode

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[#831] When the chloroplast pigments absorb light

(A) they become reduced

(B) they lose potential excited

(C) their electrons become excited

(D) the calvin cycle is triggered

Correct Answer

(C) their electrons become excited

[#832] Match List-I (Diseases) with List-II (Causative agents) and select the correct answer: List-I List-II a. Covered smut of Barley 1. Alternaria solani b. Early blight of Potato 2. Ustilago hordei c. Red rot of Sugarcane 3. Xanthomonas citri d. Citrus canker 4. Colletotrichum falcatum

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

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

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

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

Correct Answer

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

[#833] Many species of plants are capable to survive and grow in low light intensity which are known as

(A) Heliophytes

(B) Sciophytes

(C) Parasites

(D) Tropophytes

Correct Answer

(B) Sciophytes

[#834] In black rust of wheat, the fine, hair-like hyphal threads seen interspersed between the periphyses that extend through the ostiole and project much beyond the periphyses are known as

(A) Spermatiophores

(B) Paraphyses

(C) Flexuous hyphae

(D) Secondary hyphae

Correct Answer

(C) Flexuous hyphae

[#835] Which of the following normally occurs in radioactive fallout, has a half-life of 28 years and behaves like calcium in biogeochemical cycles?

(A) Cobalt-60

(B) Strontium-90

(C) Plutonium-239

(D) Krypton-85

Correct Answer

(B) Strontium-90