Variation

Question 1

How do we know if 2 animals are the same species?

Answer 1

They share similar features.

Can breed and have fertile offspring

Question 2

What do we call differences between organisms?

Answer 2

variation

Question 3

Variation (differences between individuals) is caused by…

Answer 3

Genes

Environment

Question 4

Give 3 examples of variation that are caused by genes

Answer 4

Eye colour
Hair colour
Face Shape

Question 5

Give 3 examples of variation that is caused by the environment.

Answer 5

Scars
Hair length
Amount of muscle

Question 6

Give an example of variation that is caused by both genes and the environment

Answer 6

Nose shape - genes decide the shape but you may break it or have surgery

Question 7

How are identical twins formed?

Answer 7

Fertilisation of an egg by a sperm cell
Formation of an embryo that splits in two!!
Two new embryos grow into identical twins

Question 8

Identical twins have the same…

Answer 8

genes

Question 9

Variation between identical twins is caused by…

Answer 9

the environment

Question 10

Why is the height of different students a continuous variable?

Answer 10

Because there are many different possible height values

Question 11

Why is the eye colour of different students a categoric variable?

Answer 11

Because there are only a few possible values (blue, green, brown)