Question

1. How do plants use their food?
2. How do plants without chlorophyll survive?
3. How would you show that a green leaf has starch in it?
4. How is energy from the sun passed on to animals?
5. A balance between plants and animals is essential. Why?​

Answer 1

Answer:

1. Plants use a process called photosynthesis to make food. During photosynthesis, plants trap light energy with their leaves. Plants use the energy of the sun to change water and carbon dioxide into a sugar called glucose. Glucose is used by plants for energy and to make other substances like cellulose and starch

2. Some plants which cannot prepare their own food or without chlorophyll depend on other plants like growing on them and like vanda... and some may have modified leaf like structure bt which they can trap insects and eat them like venus fly trap.

3. by an experiment we can show that green leaf has starch in it

●take a leaf from a plant.

●boil it in alcohol

alcohol is never heated directly under flame as it catches fire easily

●put few drops of iodine solution to the leaf, the leaf will turn blue-black. which shows that leaf contain starch.

4.first the plants absorb sunlight in their chloroplast which are present in the leaf the energy of sun to make food (sugar) and perform photosynthesis and give out oxygen . the other animals including human being then take the oxygen and utilise the energy given by sun in the form of oxygen

5. Because both of them are very useful to mankind if plants get furnished we can't get oxygen and other useful things whereas if animals furnished plants don't get co2 and human being can't live his life properly