Scientific Method And Characteristics Of Life ( Nutrition )

Nutrition

Process by which organism gathers the energy and materials it needs for growth, reproductive and living

Autotrophs

Make their own food from inorganic materials

Heterotrophs

Obtain nutrients by consuming complex organic matter

Excretion

Removal of metabolic waste from the body ( urea, water )

Metabolism

The sum of all the chemical reactions in a cell or organism

Egestion

Removal of undigested waste from body

Main organs of excretion

Kidneys ( urea, salt, water ) lungs ( CO2, water ) skin ( water, salt)

Homeostasis

Keeping the environmental conditions in a body stable

Stimulus

A condition that causes response

Tropism

Growth response

Hydrotropism

Growth response to water

Phototropism

Growth response to light,

Geotropism

Growth response to gravity

Thigmotropism

Growth response to touch

Reproduction

Ability to produce new organisms of the same species

Asexual

Genetically identical

Sexual

Leads to variation

Respiration

Process by which living things obtain the energy they require by the breakdown of complete chemicals

Energy is in what form?

ATP- Adenosine tri-phosphate, stores and transports energy

Aerobic Respiration

Uses oxygen, C6H12O6+6O2=6CO2+6H2O+ATP

Anaerobic respiration

In the absence of oxygen, Plants-C6H12O6=2C2OH+2CO2 Animals-C6H12O6=CH3CH(OH)COOH+H2O

Are viruses real?

No, they are non cellular, have no cell organelles, only one type of nucleic acid ( DNA or RNA )