class 7 chapter 1 Nutrition in plants🌱

The presence of starch in leaves indicate the occurrence of photosynthesis.
‌starch is also a carbohydrate.
‌The glucose is converted into starch a polymeric carbohydrate.
‌the leaves other than green also have chlorophyll. The large amount of red brown and other pigments mask the green colour. Photosynthesis take place in these leaves also.
‌Algae can also prepare their own food by the process photosynthesis.
‌carbohydrate are made of carbon, hydrogen and oxygen.
‌protein are nitrogenous substance which contain nitrogen.
‌soil has certain bacteria that convert gaseous nitrogen into a usable form and release it into the soil. These are absorbed by the plants along with water. Plants can then synthesise protein and vitamins.
‌cuscuta (amarbel) does not have chlorophyll.
‌Cuscuta is a parasitic plant. It is also called Amarbel. It is a stem holoparasitic plant, which does not have roots and leaves. It sucks nutrients from the host plants.
‌the mode of nutrition in which organism take in nutrients from dead and decaying matter is called saprotropic nutrition.
Saprotrophs - Fungi
The fungal spores are generally present in the air. When they land on wet and warm things they germinate and grow. .
‌some organisms live together and share both shelter and nutrients. This relationship is called symbiosis.
For example certain fungi live inside the roots of plants. The plants provide nutrients to the fungus and in return the fungus provides water and certain nutrients.
In organism called lichen a chlorophyll Containing partner which is an alga and fungus live together. The fungus provides shelter water and in return the alga prepares and provides food to the fungus.