Question

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Write notes of Life Proceess?
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Answer 1

◼ INTRODUCTION LiFE

Earth happens to be the only known planet having a life. There are beings who live, die and become part of nature again. The living organism can be differentiated from the inanimate entities on various parameters of life processes

◼ LIFE PROCESS

• Maintenance of living organism is essential even if they are moving, resting or even sleeping.

• The processes which together perform the function of maintenance of ‘life’ are called as life processes.

• Nutrition, respiration, circulation, excretion are examples of essential life processes.

• lIn unicellular organisms, all these processes are carried out by that single cell.

• In multicellular organisms, well-developed systems are present to carry out the processes

◼ NUTRTION

The process of acquiring food that is needed for nourishment and sustenance of the organism is called nutrition

• There are two main modes of nutrition, autotrophic and heterotrophic.

• Heterotrophic nutrition has subtypes as holozoic, saprophytic and parasitic nutrition

◼ AUTOTROPHIC NUTRITION

• If an organism can nourish itself by making its own food using sunlight or chemicals such mode of nutrition is called as autotrophic nutrition.

• Plants photosynthesize (use light energy) and are called photoautotrophs.

• Few bacteria use chemicals to derive energy and are called chemoautotrophs

◼ PHOTOSYNTHESIS

• Photosynthesis is an important process by which food is formed.

• The plants make food using sunlight and water, which provides nourishment to other organism and themselves.

• Chlorophyll present in the green parts absorbs light energy.

• This light energy is used to split water into hydrogen and oxygen.

• Hydrogen is then used to reduce carbon dioxide into carbohydrates, typically glucose.

• Chlorophyll is essential for photosynthesis and stomata to facilitate intake of carbon dioxide

◼ STOMA

• Stomata are pores on the leaves that help in exchange of gases.

• They are mostly found on the underside of the leaf.

• Each stoma is guarded by guard cells, which control the opening and closing of the pore.

• The water content of the guard cells is responsible for their function

Saprophytic Nutrition

• Saprophytic NutritionSome organism feed on dead and decaying organic matter. This mode of nutrition is called saprophytic nutrition.

• The food is partially digested outside the body and then it is absorbed.

• E.g. Fungi are saprophytes

Answer 2

Answer:

okay see the attachment