Biology variations

placing objects into groups based on similar characteristics

the science of classifying things

A group of similar organisms that are capable of naturally interbreeding with each other to produce fertile offspring

within a species means that in a group of successfully interbredding organisms the individual members show diiferent characteristics

not inherited but are learned or developed during life

speech

are controlled by genes

eye colour

causes genetic variation to occur

crossing over occurs allows genes to be exchanged

in fertilization the random assortment of genes

a spontaneous/sudden change in the amount/structure of DNA

agents that cause mutations

• gamma radiation
• formaldehyde

A large change in the structure of one or more chromosomes

the way in which living things change genetically to produce new forms of life over long periods

• Ob1: overbreeding
• Ob2: population numbers remain constant
• C1:There is struggle existence
• Ob3: inherited variations arise in species
• C2: Natural selection

The process of which those organisms with genetically controlled characteristics that allow them to be well adapted to their environment will survive and pass on to following generations

The production of new species as a result of evolution

the study of fossils

the remains of something that lived a long time ago (or some mutation of something that lived a long time ago.)

Life has changed

life has become more complex

The changes can be linked to environmental change