Q.5 Answer in one word :
1 Which day is celebrated as world water day?
2 Which lens is called converging lens?
3 In which electrical device (appliances) are an electric cells used?
4 Which type of motion is of swing?
5 Where are pollen grain produced?
Answers
Answer:
1Monday, 22 March
World Water Day 2021
2Because a convex lens concentrates the light rays that are incident on it, it is called a converging lens.
3.Electric cells are used in torches, watches ,clocks, etc. Remote , electric toys , alarm clock , calculator , radio etc... keyboard laptop toys torch remote almost all new gadgets work with this as it is a portable and safe source of electricity.
4.periodic motion
5.Pollen grains are produced by meiosis
Answer:
In angiosperms, pollen is produced by the anthers of the stamens in flowers. In gymnosperms, it is formed in the microsporophylls of the microstrobili (male pollen cones). Pollen consists of one or more vegetative cells and a reproductive cell. A pollen grain itself is not the male gamete