Topic 1. Characteristics and classification of living organisms Flashcards
- Movement
- Respiration
- Sensitivity
- Growth
- Reproduction
- Excretion
- Nutrition
Define Movement
AN action by an organism or a part of an organism resulting in a change of position or state
Define Respiration
A chemical reaction in cells that break down nutrients molecules (glucose), to release energy for metabolism
Define Sensitivity
The ability of an organism to sense stimuli from its internal and external environment and to give an appropriate response
Define Growth
Permanent increase in dry mass by an increase in cell size or cell number or both
Define Reproduction
The process of making more of the same organism
Define excretion
Removal from the body of toxic material, substances in excess requirements and waste products from metabolism
Define Nutrition
How can organisms be classified?
BY characteristics that they share
How are organisms traditionally classified?
Through their morphology and anatomy
Define a species
Group of organisms that reproduce to produce a fertile offspring
What is the bi-nominal system
A system of naming, in italic, organisms using their genus(Start with capital), and species (lower case). EG: Homo sapiens
How is DNA used in classification
Five kingdoms
- Animals
- Plants
- Fungi
- Prokaryotes
- Protoctists
Features of animals
- Multicellular
- Have a nucleus, but no cell wall or chloroplasts
- Heterotrophs
