Following statements are regarding to the mechanism of migration of pollen tube.

A. The embryo sac is the product of three mitotic divisions of the diploid megaspore; it comprises seven cells and eight haploid nuclei.

B. The two polar nuclei in the central cell will fuse with the second sperm nucleus and produce the endosperm that will nourish the egg. The other six cells, including the egg, contain one haploid nucleus each.

C. After compatible pollen germinates, the pollen tube grows toward the micropyle.

D. The three cells from the pollen are connected to one another at the tip of the tube, and waves of sodium ions play a key role in the growth of the tube.

Which of the following combinations are correct?

TLS Online TPP Program

#Question id: 19305

#Unit 12. Applied Biology

If 35S promoter is fused with Adh-I introns sequences ensures

TLS Online TPP Program

#Question id: 19306

#Unit 12. Applied Biology

35S promoter sequence is derived from which plant virus

TLS Online TPP Program

#Question id: 19307

#Unit 12. Applied Biology

Use of constitutive promoters to produce transgenic plants offers certain advantages.

(1) They can be used to drive reporter genes

(2) They are essential in proteins that are required in all tissues

(3) They are useful in driving transcription factors that are involved in transcription regulation

Mark the option with all correct statements?

TLS Online TPP Program

#Question id: 19308

#Unit 4. Cell Communication and Cell Signaling

Match the following;

Column A	Column B	Column C
A) Attack strategy	i) Secreted cell wall‐degrading enzymes   ii) Intimate intracellular contact with plant cells   iii) Initial biotrophic phase	a) Necrotrophy
		b) Biotrophy
B) Host range	iv) Intermediate   v) Narrow   vi) Broad	c) Hemibiotrophy

TLS Online TPP Program

#Question id: 19309

#Unit 4. Cell Communication and Cell Signaling

What is the role of fusicoccin?

a) reversibly opening of stomata

b) Plant wilting

c) tumour formation

d) Apoptosis of tissue

TLS Online TPP Program

#Question id: 19310

#Unit 4. Cell Communication and Cell Signaling

Fusicoccin opposed the role of _____I______ and mimic the role of____II_____.