Form 4 Biology Nutrition Types

7/25/2019 Form 4 Biology Nutrition Types

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Why do we need food?Why do we need food?

To provide energyTo provide energy

To growTo grow To repair worn-out or damagedTo repair worn-out or damaged

tissuestissues

To maintain general healthTo maintain general health


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To state the types of nutritionTo state the types of nutrition

To explain autotrophic nutritionTo explain autotrophic nutrition To explain heterotrophic nutritionTo explain heterotrophic nutrition

To classify organisms according toTo classify organisms according tothe types of nutritionthe types of nutrition


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Types

Autotroph Heterotroph

Diet

Balanced In balance

Humans and

Animals

igestion

!odents

!uminant

Humans

Absorption

and

assimilationefaecation

Plants Technology

"roduction

"rocessing

#acronutrient #icronutrient

#echanism$actors

"hotosynthesis

Temperature

"hotosynthesis

%hemosynthesis

Holo&oic

'aprophytism

"arasitism

Hydroponics and

Aeroponics

'elective breeding

Tissue culture

(enetic

engineering

'oil

#anagement

Biological control

)utrient

re*uirement

+ight

intensity

%oncentration of

%arbon ioxide

%oo,ing

%anning

$ree&ing

"asteuri&ation

$ermentation

rying

NUTRITION


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Nutrition :a process by whichorganisms obtain food or nutrients


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AUTOTROPHIC NUTRITIONAUTOTROPHIC NUTRITION

A type of nutrition in which organismsA type of nutrition in which organismssynthesise the organic compoundssynthesise the organic compounds

food. they re*uire from inorganicfood. they re*uire from inorganic

substances/substances/ The organismsThe organisms autotrophsautotrophs auto 0 self1auto 0 self1

troph 0 nutrition.troph 0 nutrition.

The energy re*uired for synthesis ofThe energy re*uired for synthesis offoodfood sunlight sunlight photosynthesisphotosynthesis. 2. 2

chemical substances chemical substances chemosynthesischemosynthesis..


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PhotosynthesisPhotosynthesis

All green plantAll green plant

'ynthesising organic'ynthesising organiccompounds from %3compounds from %3445 H5 H443 in3 in

the presence of sunlight/the presence of sunlight/


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ChemosynthesisChemosynthesis

Synthesising organic compoundsSynthesising organic compoundsby using energy from the oxidationby using energy from the oxidation

of inorganic substances such asof inorganic substances such as

COCO22, hydrogen sulphide, nitrogen or, hydrogen sulphide, nitrogen orammonia.ammonia.

Chemoautotroph :Chemoautotroph : sulphur bacteria,sulphur bacteria,Nitrosomonas spNitrosomonas sp., Nitrobacter sp.., Nitrobacter sp.


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HETEROTROPHIC NUTRITIONHETEROTROPHIC NUTRITION

A type of nutrition in whichA type of nutrition in whichorganisms hae to depend anorganisms hae to depend anautotrophs or other organismsautotrophs or other organisms

as a source of energy as theyas a source of energy as theycannot synthesise their owncannot synthesise their ownfoodfood

!he organisms!he organisms heterotrophsheterotrophs " types : holo#oic," types : holo#oic,

saprophytism, parasitismsaprophytism, parasitism


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HOLOZOIC NUTRITIONHOLOZOIC NUTRITION

$eeding by ingesting complex$eeding by ingesting complex

organic matterorganic matter digesteddigested

absorbedabsorbed Animals % insectiorous plantsAnimals % insectiorous plants


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SAPROPHYTISMSAPROPHYTISM

NUTRITIONNUTRITION $eeding by$eeding by absorbing their requiredabsorbing their requirednutrients from dead organic matternutrients from dead organic matter

or theor theorganic excretory wasteorganic excretory waste ofoforganismsorganisms

CalledCalled saprophytessaprophytes(bacteria, fungi(bacteria, fungi mushrooms, yeasts & mushrooms, yeasts & Mucor spMucor sp.).)

PARASITISMPARASITISM


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$eeding by$eeding by absorbing their nutrients fromabsorbing their nutrients fromliving organismsliving organisms

Lives on or in the bodyLives on or in the bodyof a liing organismof a liing organism

&host' % obtains its nutrients from the host&host' % obtains its nutrients from the hostparasitesparasites

$leas, lice % tapeworm$leas, lice % tapeworm

(ndoparasites % ectoparasites(ndoparasites % ectoparasites

PARASITISMPARASITISM

NUTRITIONNUTRITION


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676!%I'6 8/9676!%I'6 8/9

9/9/ (ive the difference between(ive the difference between

autotrophs and the heterotrophs/autotrophs and the heterotrophs/

4/4/ +ist+ist threethreetypes of heterotrophictypes of heterotrophic

nutrition/nutrition/

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Form 4 Biology Nutrition Types