Nutrition in Animals — Science STD 7 — Question

Distinguish between the following. Stamen and Pistil.

List the changes that occur in boys and girls during adolescence.

Boojho made an electromagnet by winding 50 turns of wire over an Iron screw. Paheli also made an electromagnet by winding 100 turns over a similar Iron screw. Which electromagnet will attract more pins? Give reason.

Define the terms conductor and insulator.

What is a virtual image? Give one situation where a virtual image is formed.

Write two common adaptive features of a polar bear which help in keeping it warm.

Can you give me a name? Solve each of the following riddles by writing the name of the organism and its mode of nutrition. One riddle is solved to help you. I am white and soft. I grow well in the rainy season. Children pluck me from the ground and admire me. I absorb nutrients from decomposed dead parts of plants and animals in the soil. , .

Paheli while moving in a forest observed that there was no noise pollution, though lots of heavy vehicles were passing from the nearby highway. Explain why?

Wild animals like tiger, wolf, lion and leopard do not eat plants. Does this mean that they can survive without plants? Can you provide a suitable explanation?

Does transpiration serve any useful function in the plants? Explain.