SB4b+c: Darwin's Theory And Development Of Evolution Theory Keywords

Question 1

Ancestor

Answer 1

An organism from which more recent organisms are descended.

Question 2

Antibiotic

Answer 2

Medicine that helps people recover from a bacterial infection by killing the pathogen.

Question 3

Competition

Answer 3

There is competition between organisms that need the same things as each other (such as food). We say that
they ‘compete’ for those things.

Question 4

Genetic variation

Answer 4

Differences between organisms caused by differences in genes and passed on to offspring by their parents through
reproduction. Also called inherited variation.

Question 5

Natural selection

Answer 5

A process in which certain organisms are more likely to survive and reproduce than other members of the same
species, because they possess certain genetic variations.

Question 6

Resistant

Answer 6

Unaffected or less affected by something.

Question 7

Pentadactyl limb

Answer 7

A limb that has five digits (fingers and thumbs). Amphibians, reptiles, birds and mammals share this
characteristic.