43.
Of the five petals of the corolla, if, the largest encloses the two laterals which in turn, overlap the two smallest fused petals then the corolla is said to be

44.
During microgametogenesis, the two gametic nuclei are produced by

45.
Consider the following statements.
1. Fertilisation of the egg takes place inside the embryo sac.
2. Fertilised ovum form the embryo.
3. Endosperm is generally triploid.
Which of the statements given above are correct?

46.
Which one of the following is the process involved in photosynthesis?

49.
Consider the following statements regarding mangrove vegetation and choose the correct answer:
1. True mangrove vegetation occurs in open beach or in sandy or rocky shores of the sea
2. The vegetation rarely develops in wet tropics where the tropical rain forest is the climax vegetation
3. In world, the eastern mangrove is found on the coasts of Indian ocean and the western part of the Pacific ocean
4. Most of the species of mangrove formations are gregarious in habit