Transportation in Animals and Plants — Science STD 7 — Question

In the figure of a flower given in Figure, label the parts whose functions are given below and give their names.

1. The part which contains pollen grains.
2. The part where the female gamete is formed.
3. The female reproductive part where pollen grains germinate.
4. The colourful part of flower which attracts insects.

The bulb in the circuit shown in Figure does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow.

Compare conduction and convection with one real-life example each.

A snake charmer came to the society and smelled the presence of a cobra near the guardroom. The head of the society agreed to allow the man to search, catch and take away the snake with him. Little Krishi who was seeing all this disagreed. He explained the people that it might disturb the food chain in the environment. Now, answer the following Questions.

1. Describe food chain.
2. Construct a food chain involving snake at one of its level.
3. What are the values shown by Krishi?

Draw in your notebook the symbols to represent the following components of electrical circuits: connecting wires, switch in the ‘OFF’ position, bulb, cell, switch in the ‘ON’ position, and battery

Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and the third is a sugar solution. How will you identify them? You have only turmeric indicator.

With the help of Newton’s disc, prove that seven colours of the rainbow can be recombined and produce white light.

In a city, there are separate pipes for disposing sewage and storing water. Why is this necessary?

What are the importance of forest resources?