2. What is nutrition? Name the major modes of nutrition.3. Differentiate between autotrophs and heterotrophs.4. What is photosynthesis? Write equation for photosynthesis.5. Where are stomata located? Write two important functions performed by stomata.6. How are the minerals and water reach the leaves from the roots?7. How does chlorophyll help in the process of Photosynthesis?8. How do we test the presence of starch in the leaves?9. Draw and label a neat diagram of stomata.10.What are algae? Are they autotrophs?11. How do plants obtain nitrogen to synthesise proteins?12. What mode of nutrition is found in cuscuta and why?13. efine host and parasite?

14. What are insectivorous plants? How

1. Nutrition is the process by whuch nutrients from food are absorbed and processed by the body to grow ,reproduce and to maintain good health.
2. The major modes of nutrition are hetertrophic nutrition , auto trophic nutrition , holozoic nutrition ,parasitic nutrition , saphrophytic nutrition,insectivorous and symbiosis nurition .
3. Autotrophs prepare food by themselves while heterotrophs depend on other plants and animals for food.
4. The process by which green plants prepare food using co₂ and h₂0 in the prescence of sunlight and chlorophyll and release oxygen and carbohydrates is called photosynthesis. carbon dioxide +water___sunlight_and chlorophyll_________= oxygen + carbohydrates.
5. the stomata are located on the lower side of the leaf of the plant . The stomata let in carbon dioxide and give out oxygen .
6. Mineral salts are absorbed through the roots and reach the leaves through xylem inthe stem .
7. Chlorophyll traps the sunligt traps the sunligt required for the preparation of food.
8. Boil the leaf for a few minutes. place it in a test tube of ethanol which will dissolve the chlorophyll and decolourise the leaf .Now wash it with old water to remove th ethanol. Add a few drops of iodine solution .If starch is there thecolour will change to blue black.

9.

10.Algae is an autotrophic plant which prepares its own food .

11. Plants cannot take nitrogen directly from the soil . Nitrogen fixing bacteria present in the soil help them do it.

12. Parasitic because it is dependent on a host and does not make its own food.

13. The living organism from which the parasite derives its food is known as host . The non-green plants that grow and feed on other living organisms are called parasites .

14. Plants which supplement thier nutrients by trapping and digesting animals , particularly insects are calles insectivores or insectivorous plants.

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The mode of taking food and its utilization by the body is known asnutrition.

Basically, there are two types of nutrition-

I. Autotrophic Nutrition:-The mode of nutrition in which organisms manufacture their own food using inorganic components like water and carbon dioxide as well as sunlight as the source of energy is known as autotrophic mode of nutrition. For example- Green plants

II. Heterotrophic Nutrition:- The mode of nutrition in which the organism cannot make their own food, they are dependent on plants and other animals for nutrition, it is known as heterotrophic mode of nutrition. For example- animals.

There are four types of heterotrophic mode of nutrition:

• 1. Holozoic mode of nutrition:The mode of nutrition in which food is taken in solid/liquid form from outside and is digested inside their body, this mode of nutrition is known as holozoic mode of nutrition. For example: Humans.
• 2. Parasitic mode of nutrition:The mode ofnutrition where the organism lives in or on the other organism and derive its food from the body of the host is called parasitic mode of nutrition. For example:Cuscuta.
• 3. Saprophytic mode of nutrition:The mode of nutrition in which the organism takes nutrients in solution from dead and decaying matter is called saprophytic nutrition. For example: Mushrooms.
• 4. Symbiotic mode of nutrition:The mode of nutrition in which organisms live in association with other plants or animals and share their resources. In this kind of relationship, both the partners are benefitted by the relationship. For example: Lichen- an association between algae and fungi.

The mode of taking food and its utilization by the body is known asnutrition.

Basically, there are two types of nutrition-

I. Autotrophic Nutrition:-The mode of nutrition in which organisms manufacture their own food using inorganic components like water and carbon dioxide as well as sunlight as the source of energy is known as autotrophic mode of nutrition. For example- Green plants

II. Heterotrophic Nutrition:- The mode of nutrition in which the organism cannot make their own food, they are dependent on plants and other animals for nutrition, it is known as heterotrophic mode of nutrition. For example- animals.

There are four types of heterotrophic mode of nutrition:

• 1. Holozoic mode of nutrition:The mode of nutrition in which food is taken in solid/liquid form from outside and is digested inside their body, this mode of nutrition is known as holozoic mode of nutrition. For example: Humans.
• 2. Parasitic mode of nutrition:The mode ofnutrition where the organism lives in or on the other organism and derive its food from the body of the host is called parasitic mode of nutrition. For example:Cuscuta.
• 3. Saprophytic mode of nutrition:The mode of nutrition in which the organism takes nutrients in solution from dead and decaying matter is called saprophytic nutrition. For example: Mushrooms.
• 4. Symbiotic mode of nutrition:The mode of nutrition in which organisms live in association with other plants or animals and share their resources. In this kind of relationship, both the partners are benefitted by the relationship. For example: Lichen- an association between algae and fungi.

Nutritionis the selection offoodsandpreparation of foods, and their ingestion to beassimilatedby the body. By practicing ahealthy diet, many of the known health issues can be avoided.^[1]Thedietof an organism is what it eats, which is largely determined by the perceivedpalatabilityof foods.

Dietitiansarehealth professionalswho specialize inhuman nutrition, meal planning, economics, and preparation. They are trained to provide safe, evidence-based dietary advice and management to individuals (in health and disease), as well as to institutions. Clinicalnutritionistsare health professionals who focus more specifically on the role of nutrition in chronic disease, including possible prevention or remediation by addressing nutritional deficiencies before resorting to drugs. Government regulation of the use of this professional title is less universal than for "dietician."

A poor diet may have an injurious impact on health, causing deficiency diseases such asscurvy^[2]andkwashiorkor;^[3]health-threatening conditions likeobesity^[4][5]andmetabolic syndrome;^[6]and such common chronic systemic diseases ascardiovascular disease,^[7][8]diabetes,^[9][10]andosteoporosis.