Evolution by Gene Epoch

The earliest geological time period among the folowing is

• Cambrian

• Permian

• Jurrasic

• Quaternary

Genetic Differences between organusm of same species

• Behaviour

• Environment

• Adaption

• Variation

The struggle of existence agaibst other members of an organisms

• Competetion

• Gene flow

When did dinosaurs extinct

• 100 billion years ago

• 150 billion years ago

• around 60-70 billion years ago

• They are not extinct they were killed by human

identify homologous organs from below examples

• Human arms and wings of birds

• Wings of birds and insects

• Legs of dogs and spider

• Hands of humans and front legs of cattle

Organisms with traits that are best suited to the environment will

• Become extinct

• Increase in number

Force that initiates evolution is

• Variation

• Mutation

• Extinction

• Adaption

What is the study of organisms at the early stages of development?

• DNA studies

• Extinction

• Fossil record

• Comparitive embryology

When looking at two birds of the same species, you notice that one has darker feathers than the other one. You also notice that one has a beak that is just a little longer. These slight difference within members of the same species are called

• Fossils

• Meiosis

• Variation

• Extinction

Sometimes bones in the front limbs of animals are very similar in structure. What do we call similar types which indicates common ancestors

• Homologus

• Gradualism