Plant Anatomy And Physiology - Study Mode

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[#526] Consider the following statements regarding the germination of pollen grain and choose the correct answer: 1. The content of the pollen is a true male gametophyte 2. The pollen tube comes out due to the protrusion of the exine through the germ pore 3. When the pollen grain has germinated, the pollen tube penetrates the stigma through the stigmatic papillae 4. Some stigmas have a continuous cuticle in which pollen tubes penetrate by enzyme action

(A) Only 2, 3 and 4 are true

(B) Only 1, 2 and 3 are true

(C) Only 1, 3 and 4 are true

(D) Only 1, 2 and 4 are true

Correct Answer

(C) Only 1, 3 and 4 are true

[#527] Savannah forest of Burma is also known as

(A) Patanas

(B) Bush forest

(C) Taiga

(D) Monsoon forest

Correct Answer

(B) Bush forest

[#528] Which of the following is the component of water potential influenced by the presence of a matrix?

(A) Pressure potential

(B) Matrix potential

(C) Solute potential

(D) Diffusion pressure

Correct Answer

(B) Matrix potential

[#529] By which of the following means of adaptation the animals orient themselves to face into current and move upstream?

(A) Chemotaxis

(B) Thigmotaxis

(C) Rheotaxis

(D) None of the above

Correct Answer

(C) Rheotaxis

[#530] The ocean is continuous throughout the world except for the deep water of the

(A) Arctic ocean

(B) Pacific ocean

(C) Indian ocean

(D) None of the above

Correct Answer

(A) Arctic ocean