A2.2.7 Processes of life in unicellular organisms

Metabolism

The sum of all chemical reactions in a cell

Movement

Process of changing place and or position

Nutrition

Process of taking in food and converting it into energy

Organism

A living thing that carries out the processes of life

Growth

The increase of mass and size in an organism

Homeostasis

Keeping internal environments within a certain range despite changes in the external environment

Chlamydomonas

Eukaryotic organisms that live in soil, freshwater, oceans, and snow on mountaintops

Response

Recognition and response to changes in environmental conditions

Unicellular

An organism with only one cell

Stimuli

A chemical or physical change in the environment that triggers some behavioral change in an organism

Reproduction

The production of offspring via sexual or asexual means

Excretion

Process in which metabolic waste is eliminated from an organism

Paramecium

Eukaryotic organisms that live in freshwater environments