Plant Anatomy And Physiology - Study Mode

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[#786] During summer or dry season, tropophytic flora behaves as a

(A) Chasmophyte

(B) Xerophyte

(C) Mesophyte

(D) Epiphyte

Correct Answer

(B) Xerophyte

[#787] Match List-I with List-II and select the correct answer: List-I (Diseases) List-II (Causative agents) a. "Fire blight" of apple and pear 1. Pseudomonas solanacearum b. "Crown gall" of tomato 2. Pseudomonas cirri c. "Citrus canker" 3. Bacterium tumefaciens d. "Brown rot" of Solanaceae 4. Bacillus amylovorus

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

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

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

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

Correct Answer

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

[#788] Consider the following statements and choose the correct answer: 1. The biogeographical realms are regions made up of whole continents, or of large parts of a continent, separated by major geographic barriers and characterized by the presence of certain unique animals and plants 2. In each biome the kind of climax vegetation is uniform - grasses, conifers, deciduous trees but the particular species of plant may vary in different parts of the biome 3. There is usually a sharp line of demarcation between adjacent biomes 4. The definition of biome includes not only the actual climax community of a region but also the several intermediate communities that precede the climax community

(A) Only 1, 2 and 3 are true

(B) Only 1, 3 and 4 are true

(C) Only 1, 2 and 4 are true

(D) 1, 2, 3 and 4 are true

Correct Answer

(C) Only 1, 2 and 4 are true

[#789] Consider the following statements regarding the embryological features of Exocarpus and choose the correct answer: 1. The development of anther is normal 2. Four celled pollen grains are shed at the time of dehiscence of anther 3. Development of 8 nucleate Polygonum type of embryo sac takes place 4. The seed is not 'naked'

(A) Only 1, 3 and 4 are true

(B) Only 2, 3 and 4 are true

(C) Only 1, 2 and 3 are true

(D) Only 1, 2 and 4 are true

Correct Answer

(A) Only 1, 3 and 4 are true

[#790] Consider the following statements and choose the correct answer: 1. Control of land loss can be attempted through restoring forest and grass cover to check erosion and floods 2. Shifting cultivation can be replaced by crop rotation, mixed cropping or developing piantation crops which would improve fertility and support a large population 3. Salinity can be prevented by covering the area with appropriate plant species and by raising trees as wind breaks 4. Shifting sand can be controlled by mulching

(A) Only 1, 2 and 3 are true

(B) Only 1, 3 and 4 are true

(C) Only 1, 2 and 4 are true

(D) Only 2, 3 and 4 are true

Correct Answer

(C) Only 1, 2 and 4 are true