Edexcel Core GCSE Science B1

Describe characteristics of organisms in the animal kingdom.

What main characteristic do organisms in the Chordata phylum have in common?

What do all vertebrates have in common?

What does oviparous mean and name a group of vertebrates that are oviparous.

What is a species?

What is the name of the offspring of two different species?

In the binomial system each organism is given a two-part name. What does each part refer to?

Other than the environment, what causes variation?

List three features of animals which aren't affected at all by environment, and three which are.

What is continuous variation?

What is discontinuous variation?

Give an example of a feature in humans where there is continuous variation.

Give an example of a feature in humans where there is discontinuous variation.

Explain two ways that deep-sea fish have adapted to their habitat.

Explain two ways that polar bears are adapted to living in polar regions.

Explain Darwin's theory of natural selection.

Give three ways that the scientific community validate evidence.

What is speciation?
Explain how geographical isolation can lead to speciation.

How many pairs of chromosomes are there in a normal human cell nucleus?

What is an allele.

What is meant by an organism being heterozygous?

What is meant by an organism being homozygous?