7d Classified Flashcards
Variation is
Differences between organisms
Species def
A species is a group of organisms who can reproduce with each other to create offspring which can also reproduce
Links between differences are called
Correlations
What is continuous variation ?
A range of values that gradually change . In a chart it will be a be a bell shape . The bell shale is known as normal distribution . Normal cos it is what we expect to find in things that show continuous variation.
What is discontinuous variation
When you either can or can’t there isn’t a continuous range of option for example some people can roll their tongues others can not .
Two main groups of animal kingdom
Vertebrates - amphibians , birds , fish , mammals, reptiles
Invertebrates - Arthropods , molluscs , echinoderms
How are organisms classified
By what they look like but only their inherited variations are considered not environmental