Plant Anatomy And Physiology - Study Mode

Show All Answers

[#711] In a mature ovule the egg-apparatus is composed of

(A) Two large eggs and a single synergid

(B) Only a large egg

(C) A large egg and three antipodal cells

(D) A large egg and two synergids

Correct Answer

(D) A large egg and two synergids

[#712] Consider the following statements and choose the correct answer: 1. The carbon, nitrogen and various cycles in nature operate to conserve the limited amount of usable matter on the earth 2. The flow of energy is both cyclic and one-way 3. The transfer of energy through a biological community begins when the energy of sunlight is fixed in a green plant by photosynthesis 4. It is estimated that only 8 percent of the energy of the sun reaching the planet strikes green plants and that only 2 percent of this is utilized in photosynthesis

(A) Only 1, 2 and 3 are true

(B) Only 2, 3 and 4 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

[#713] The vegetation with vertical gradient of gradually decreasing temperature from the surface is known as

(A) Thermocline

(B) Metalimnion

(C) Hypolimnion

(D) Epilimnion

Correct Answer

(D) Epilimnion

[#714] The adsorption of water by a confined imbibant develops

(A) A pressure of less magnitude

(B) A pressure of zero magnitude

(C) A pressure of enormous magnitude

(D) None of the above

Correct Answer

(C) A pressure of enormous magnitude

[#715] According to Melchers grafting experiments, which of the following plant parts responds initially to cold treatment?

(A) Root tip

(B) Stem apex

(C) Flower bud

(D) Primary root

Correct Answer

(B) Stem apex