Page 4 - E-Biology Sec.2 2024-2025 U1_Handy

Chapter 1: Nutrition And Digestion In Living Organisms
L1: Autotrophic Nutrition (Absorption Of Water & Salts)

Nutrition is the scientific study of food and various modes of feeding by livings.

Types of nutrition

Autotrophic nutrition Heterotrophic nutrition

Autotrophs “ Self-feeder” are organisms can Heterotrophs “other eaters” are
make their food by themselves through organisms obtain their food from
chemical reactions inside their cells by the other organism’s bodies in the form
help of light energy from the sun to of high-energy & complex ready
synthesize the high-energy & complex organic food.
organic food from simple, raw and low- Ex: 1- Holozoic:
energy inorganic materials. (Herbivores, Carnivores & Omnivores)

Inorganic Photosynthesis Organic 2- Parasites:
Material Compounds (Bilharzia & Orobanche plant).

s

EX: green plants & types of bacteria.

3- Saprophytes:
(some fungi & saprophytic bacteria)

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First Term