a) Why don't all the seeds of a plant grow into new plants?
b) What is seed dispersal? Why is it important?
c) How are animals helpful in the dispersal of seeds?
d) How do farmers protect their crops?
e) Draw the structure of a seed and label its parts.
Answers
Answer a:- If all the seeds of a plant fall under the parent plant, there will be shortage of space for the germination of the seeds. Even if they germinate, they cannot grow properly due to scarcity of food resources and also space. ... For all these reasons, seed dispersal is necessary.
B:- Dispersal of seeds is very important for the survival of plant species. If plants grow too closely together, they have to compete for light, water and nutrients from the soil. Seed dispersal allows plants to spread out from a wide area and avoid competing with one another for the same resources.
C:- Animals can disperse seeds by excreting or burying them; other fruits have structures, such as hooks, that attach themselves to animals' fur. Humans also play a role as dispersers by moving fruit to new places and discarding the inedible portions containing the seeds.
D:- The best ways to protect crop damage are by incorporating integrated pest and insect management. Spraying insecticides, pesticides help to minimize the crop damage by controlling the insects and other pests.
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