Reproduction in Plants — Science STD 7 — Question

What do you mean by reeling of silk?

What is seed dispersal? What will happen if all the seeds of a plant were to fall at a same place and grow?

How do the plants like sugarcane, potato and rose reproduce when they cannot produce seeds?

Last Sunday Girish's mother, Priyanka was preparing the dinner in her kitchen for Girish and his father. Both of them were feeling so much hungry and they sat ideally on their respective chairs and having empty plates and spoons on their dinning table. They were shouting like a 5 years old child that they wanted the dinner so eagerly to fulfil their stomach. After sometime, Girish's mother served the cooked food to both of them and when Girish was just about to eat the rice with the help of spoon, he noticed that the spoon has such a shining surface that it reflected the light rays incident on it.
(i) Explain the importance of shining surface in the reflection of light.
(ii) Name the type of spherical mirror represented by the shining steel spoon.
(iii) Mention the values shown by Priyanka here towards her family

Give one use each of a concave and a convex mirror.

Draw the symbols of the following circuit components.

1. Electric cell.
2. Switch in off position.
3. Electric bulb.
4. Battery.

Show groundwater and water table via a sketch.

State one function of the following:

1. Arteries.
2. Vein.
3. Capillaries.