Tuesday, 22 September 2015

Science notes # 6

- Nutrition is the mode of taking food by an organism and its utilization by the body.

- Plants are called autotrophs.

- Leaves are the food factories of plants.

- The leaves have a green pigment called Chlorophyll II.

- Chlorophyll, Sunlight, Carbon dioxide and water are necessary to carry out the process of Photosynthesis.

- The presence of starch in leaves indicate the occurrence of Photosynthesis.

- Starch is a carbohydrate.

- Soil has certain bacteria that convert gaseous nitrogen into a usable form and release it into the soil.

- Cuscuta is a plant that does not have chlorophyll and takes ready made food from the plant on which it is climbing.

- Insect eating plants are called Insectivorous plants.

- The bacterium called Rhizobium can take atmospheric nitrogen and convert it into a soluble form.

Source: VII NCERT SCIENCE chapter 1