Tamil Nadu (English Medium) Plus 2 Biology Science Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
A sleep movement in plants is a nastic response, that occurs daily in respose to

(A) dark	(B) light
(C) water	(D) both '1' and '2'

Question-2
Thigmotropism is best exhibited by

(A) root apex	(B) tendrils
(C) thorns	(D) lamina

Question-3
A pigment concerned with both floral induction and seed germination is

(A) florigen	(B) chlorophyll
(C) phytochrome	(D) plastocyanin

Question-4
Low temperature treatment of seed is called as

(A) scarification	(B) pasturization
(C) vernalization	(D) fermentation

Question-5
Which of the following gas is a growth regulator?

(A) acetylene	(B) ethylene
(C) benzene	(D) methane

Question-6
The growth of plant is

(A) limited	(B) unlimited
(C) unlocalised	(D) none of these

Question-7
Which of the following is correct for auxin?

(A) ripening of fruits	(B) breaking of dormancy
(C) inhibition of flowering	(D) stimulation of root growth

Question-8
cell elongation in internodal regions of the green plants takes place due to

(A) ethylene	(B) cytokinin
(C) gibberellin	(D) indole acetic acid

Question-9
Seed dormancy, ageing and abscission are caused by

(A) auxin	(B) cytokinin
(C) gibberellin	(D) abscisic acid

Question-10
Parthenocarpic development of fruit is brought about by

(A) 2,4-D	(B) 2,4,5-T
(C) NAA,2-T	(D) NAA,2,4-d

Click here to see your answersheet and detailed track records.

Plus 2 Biology Science

Tamil Nadu (English Medium)

Practice in Related Chapters
Taxonomy of Angiosperms
Anatomy of Plants
Biology in Human Welfare
Cell Biology and Genetics
Plant Physiology
Biotechnology