TOPIC 1 Flashcards
What 8 characteristics do all living organisms share?
- Movement
- Respiration
- Sensitivity
- Growth
- Reproduction
- Excretion
- Nutrition
Define movement
When an organism changes its position or place.
Define respiration
The biochemical reactions in cells that break down molecules to release energy.
Define sensitivity
The detection of a stimulus and the ability to respond to that stimulus.
Define growth
A permanent increase in the size of an organism by either the increase in the number of cells or the size of the cells.
Define excretion
The removal of waste products from metabolic processes or substances in excess.
Define reproduction
The creation of offspring of the same species as the parnt(s).
Define nutrition
The intake of substances required for growth and to provide energy.
Why are viruses not living?
They do not have all 8 characteristics of living organisms.
Define species
A group of organism that can breed to produce fertile offspring.
What is phylogenetics?
The study of evolutionary relationships.
Give 2 ways that organisms can be classified
- Physical features.
- Phylogenetic relationships.
How are modern classification techniques more accurate?
Biochemical and genetic analysis gives a more precise and detailed understanding about the relationships of organisms.
How can organisms that share recent common ancestors be identified?
Analyse the organism’s DNA (organisms with more similar DNA sequences often share more common ancestors).
What are the 5 kingdoms?
- Prokaryotae
- Protoctista
- Fungi
- Plantae
- Animalia
