Biology-Characteristics of life

Metabolism

Sum of all chemical reactions in an organism

Anabolic reactions

Smaller molecules to larger molecules using energy (Ana grows up)

Catabolic reactions

Larger molecules to smaller molecules releasing energy (cats have kittens)

Continuity of life

All cells arise from pre existing cells

Uni cellular

Organisms that consist of only one cell

Multi cellular

Organisms that consist of many cells

Organisation

The organism is structured with cells tissues organs etc.

Cells

Building block of life

Tissues

Groups of small cells working together with a similar function

Organs

Groups of tissues working together with similar functions

Systems

Groups of organs working together

Nutrition

The way organisms obtain food

Autotroph

Organisms that can make their own food (plants)

Heterotrophs

Organisms that need to get their food from other organisms (animals)

Respiration

The release of energy from glucose

Growth

The increase in an organisms volume, mass and complexity over time

Homeostatis

The maintenance of a constant internal environment

Excretion

The removal of metabolic waste products

Response

The ability of organisms to react to stimuli

Reproduction

The formulation of new organisms

Sexual reproduction

The formation of organisms with two parents and the fusion of gametes

Asexual reproduction

The formation of new organisms with one parent and no gametes

Heredity

The passing on of genes from parents to offspring