13.
In which of the following growth phasesnon-vacuolated cells become mature and multiply?

14.
Match List-I with List-II and select the correct answer:
List-I List-II
a. Androecium 1. Female reproductive organ
b. Gynoecium 2. Male reproductive organ
c. Stamen 3. Unit of androecium
d. Carpel 4. Unit of gynoecium

15.
The development of Crucifer type of embryo has been studied first of all in which of the following members of cruciferae ?

17.
Consider the following statements regarding sporogenesis and choose the correct answer:
1. Gametes ape always unicellular and microscopic in size
2. The union of similar gametes is called fertilization
3. The zygote formed as a result of fertilization is called zygospore
4. The seed on germination gives rise to a new plant

19.
Which of the following methods measures net production and is used only in such locations from where food produced is not removed simultaneously?

20.
Match List-I (Grassland types of India) with List-II (Climatic conditions) and select the correct answer:
List-I List-II
a. Phragmites-Saccharum type 1. On paddy tracts and high rainfall belt
b. Deyeuxia-Arundinella type 2. In mixed temperate alpine climate
c. Deschampsia-Deyeuxia type 3. In mixed temperate climate
d. Bothriochloa type 4. On marshy localities