Transportation in Animals and Plants — Science STD 7 — Question

How is a battery formed?

Pick the odd one out from the following on the basis of mode of reproduction and give reason for it, Sugarcane, Potato, Rice, Rose.

'A' got her gall bladder removed surgically as she was diagnosed with stones in her gall bladder. After the surgery, she faced problems in digestion of certain food items, when consumed in bulk. Can you tell which kind of food items would they be and why?

Explain the term lateral inversion.

Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.

Briefly explain why in ambulance words are written laterally inverted.

The major function of the arteries is to carry to oxygenated blood throughout the body and that of veins is to carry deoxygenated blood from body parts to heart for purification. There is one artery that carries deoxygenated blood and one vein that carries oxygenated blood. Name the artery and vein.

If a spoon is made of coal, what problems may arise?

Give an example of a chemical reaction for each of the following situation: A change in colour is observed.

What is a solstice? Explain with examples.