Plant and Animal Hormones-1

1. .......... were the first plant hormones discovered
a. Auxins
b. Cytokinins
c. Gibberellins
d. Ethylene

2. Which hormone is produced at the tip of stems and roots?
a. Cytokinis
b. Ethylene
c. ABA
d. Auxins

3. Who observed unilateral growth and curvature of canary grass (Phalaris canariensis)?
a. Kogl and Haagen simth
b. Charles Darwin
c. Frits Warmolt went
d. Lamark;

4. Who demonstrated the existence and effect of auxin in plants ?
a. Thomas addison
b. Frits warmolt went
c. W.M. Bayliss
d. E.H. Starling

5. Frits Warmolt went did a serious of experiments in ..........
a. Avena coleoptile
b. Watermelon
c. Zeamays
d. Gibberella fuji kuroi

6. ............... breaks dormancy of potato tuber
a. Auxins
b. Cytokinins
c. ABA
d. Gibberellins

7. ................. is a groth inhibitor which regulates abscission and dormancy
a. Auxins
b. Abscisic Acid
c. Cytokinis
d. Gibberellins

8. ................. increases tolerance of plants to various kinds of stress so it is called as stress hormone
a. Abscisic Acid
b. Auxins
c. Indole 3 Acetic Acid
d. 2,4, D

9. ABA promotes senescence in leaves by causing loss .................
a. Plasmid
b. Chlorophyli
c. Xanthophyll
d. Carrotiond

10. ABA induces buddormancy towards the apporach of winter in trees like .................
a. Mango
b. Bananna
c. Birch
d. Apple