12th class (Fsc) Biology unit 4 MCQs
chapter 4 MCQs 12th Class Biology
Reproduction:
1. Reproduction is very important for the survival of:
a. Species
b. Individuals
c. Population
d. Both A & B
2. developing seed are rich source of:
a. Gibberellins
b. Auxins
c. Cytokinin
d. All of these
3. Which one is parthenogenic fruit?
a. Peach
b. Apple
c. Mango
d. Pineapple
4. The special condition of rest, which enables an embryo to survive the long periods is:
a. Seed dormancy
b. Root dormancy
c. Plant dormancy
d. Shoot dormancy
5. The vitamins are essential raw materials for the synthesis of:
a. Holoenzymes
b. Coenzymes
c. Apoenzymes
d. Activators
6. Parthenocarpy is sometimes artificially induced in tomato, pepper etc, by adding:
a. Auxin
b. Abscisic acid
c. Gibberellins
d. Cytokinni
7. Reproduction is necessary for the survival of:
a. Community
b. Individual
c. Biome
d. Species
8. Fruit ripening is due to the production of:
a. Gibberellins
b. Auxin
c. Ethane
d. Cytokinin
9. Vehicle for transport of male gamete in land plant is:
a. Pollen grain
b. Water
c. Wind
d. Pollen tube
10. Fruit development without fertilization is:
a. Parthenocarpy
b. Dormancy
c. Parthenogenesis
d. Climacteric
11. Germinating pollen grain is a rich source of:
a. Cytokinin
b. Gibberellins
c. Ethane
d. Auxin
12. Fruit ripening is often accompanied by burst of respiratory activity called:
a. Photoperiodism
b. Apomixes
c. Endosperm
d. Climacteric
13. Evolution of pollen tube is parallel to the evolution of:
a. Flower
b. Stem
c. Seed
d. Leaves
14. Parthenocarpy is induced in tomato and pepper by adding:
a. Ethane
b. Auxin
c. Abscisic acid
d. Cytokinin
15. In tomato and peppers parthenocarpy is artificially induced by adding:
a. Abscisic
b. Auxins
c. Ethane
d. Cytokinin’s
16. Parthenocarpy is the development of fruit without:
a. Fertilization
b. Pollination
c. Hormones
d. Germination
17. In plants photoperiod and temperature effect:
a. Fruit and seed production
b. Flowering
c. Buds and seed dormancy
d. All of these
18. Photoperiod affects flowering when shoot meristem producing:
a. Floral buds
b. Leaves
c. Lateral buds
d. Both B and C
19. An example of long-day plants is:
a. Corn
b. Tomato
c. Soyabean
d. Cabbage
20. The leaf unrolling is promoted by red light in:
a. Dicots
b. Bryophytes
c. Monocots
d. Pteridophytes
21. Effect of photoperodism was first studied in 1920 by:
a. Garner and Allard
b. Garner
c. Charles Lyell
d. Allard
22. P660 is quiescent from is converted to active p 730 by the absorption of :
a. Red light
b. Blue light
c. Orange light
d. Yellow light
23. The light effective in preventing flowering in cocklebur is:
a. Yellow
b. Blue light
c. Far red light
d. Red light
24. The light which promotes germination of fern spores:
a. Blue
b. Green
c. Red
d. White
25. Tobacco plant produces flower in:
a. Autumn
b. Spring
c. Winter
d. Summer