Life Processes

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What are life processes?

The processes which together perform this maintenance job are life processes

What is nutrition?

Process to transfer a source of energy from outside the body of the organism, to the inside.

Most food sources are ______ based

Carbon

What is the most common chemical mean to break down molecules?

Oxidizing - Reducing reactions / Redox reactions

What is respiration?

The process of acquiring oxygen from outside the body and to use it in the process of break down of food

Chemical equation for formation of glucose

6(CO2) + 12(H2O) = C6H12O6 + 6(O2) + 6(H2O)

Chemical representation of the compound of glucose

C6H12O6

What are the events that occur during photosynthesis?

Absorption of light energy by chlorophyll
Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen
Reduction of carbon dioxide to carbohydrates

What are Stomata?

Tiny pores present on the surface of leaves

What is the function of Stomata?

Massive amounts of gaseous exchanges take place through the stomata for the purpose of photosynthesis

Why does the stomata get closed?

Large amounts of water can also be lost through the stomata, so the plant closes when it does not need carbon dioxide for photosynthesis

What is the function of guard cells?

The opening and closing of a stomata pore

How do guard cells open/close a stomata pore?

• Swell when water flows into them, causing stomata to open

• Stomata closes when guard cells shrink

Autotrophic nutrition

Organisms synthesize their own food

Heterotrophic nutrition

Organisms depend upon other organisms for food

Examples of parasitic nutrition

• Cuscuta (Amar-bel)

• Ticks

• Lice

• Leeches

• Tape Worms