The Characteristics of Life


Metabolism

is the sum of all the chemical reactions in an organism

Anabolic

Catabolic

catabolism

anabolism

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Catabolic

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Main topic

5. Reproduction

is the production of new individuals.

Asexual Reprodution- involves simple organisms splitting into 2 or more identical offsprings.

Sexual Reproduction- the union of sex cells (gametes) formed by two parents. male and female

4. Response

the way in which all living things react to changes (stimuli) in their environment or surroundings.

PLANTS- respond to water , light, gravity, touch and chemicals.

ANIMALS- respond to stimuli such as light ,temperature, pressure, and sound

3. Excretion

is the removal of waste products of metabolism frorm the body.

plants excrete waste gases through openings called stomata.

in humans exretory structures are the skin, lungs and urinary system (kidneys and bladder).products exreted are carbon dioxide,salts and surplus water.

2. Nutrition

is the way organisms obtain and use food.

The sun is the basic source of energy for all nutrition.

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plants use sunlight directly to make food.- Photosynthesis.sun (energy)===> Plants (energy) ===>Animals

1. Organisation

living things are composed of cells, tissues, organs and organ systems.

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cell- cheek celltissue- lining of cheekorgan-stomachorgan system- digestive systemorganism- individual human population- all the people living in one area

Life

the prossession of all the characteristics such as organisation nutirition excretion response and reproduction