G Answer the following questions.
1. What is seed dispersal? Discuss the various agents of seed dispersal with
suitable examples.
2. With the help of a diagram, explain the process of stem cutting and grafting
3. How are crops grouped? Give two examples for each type.
4. List the various steps involved in agriculture. Explain the processes of
irrigation and harvesting. short answers
Answers
Answer:
1 Seed dispersal is the movement, spread or transport of seeds away from the parent plant. Plants have limited mobility and rely upon a variety of dispersal vectors to transport their propagules, including both abiotic vectors such as the wind and living (biotic) vectors like birds. Seeds can be dispersed away from the parent plant individually or collectively, as well as dispersed in both space and time. The patterns of seed dispersal are determined in large part by the dispersal mechanism and this has important implications for the demographic and genetic structure of plant populations, as well as migration patterns and species interactions. There are five main modes of seed dispersal: gravity, wind, ballistic, water, and by animals. Some plants are serotinous and only disperse their seeds in response to an environmental stimulus. Dispersal involves the letting go or detachment of a diaspore from the main parent plant
2.
Answer:
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