3 marksFoundation
A food chain on a farm is: grass → rabbit → fox.
.1What is the grass in this food chain?
[1 mark] .2What do the arrows in a food chain show?
[1 mark] .3In a stable community, what usually happens to the fox population after the rabbit population increases?
[1 mark] 4 marksFoundation
Differences in the characteristics of individuals in a population are called variation.
.1Which two characteristics are caused only by the genes a person inherits? Tick two boxes.
[2 marks] .2What is a mutation?
[1 mark] .3Name the process by which organisms best suited to their environment are more likely to survive and breed.
[1 mark] 3 marksFoundation
Hormones are chemicals secreted by endocrine glands.
.1Name the gland in the brain that is often called the 'master gland'.
[1 mark] .2Which gland produces insulin?
[1 mark] .3How do hormones travel to their target organs?
[1 mark] 4 marksFoundation
Automatic control systems keep conditions inside the body within narrow limits.
.1Put the parts of a control system in order, starting with the stimulus.
[1 mark] .2What is homeostasis?
[1 mark] .3Which two internal conditions are controlled by homeostasis? Tick two boxes.
[2 marks] 3 marksFoundation
A person touches a hot pan and quickly pulls their hand away. This is a reflex action.
.1Put the parts of the reflex arc in order, starting with the receptor.
[1 mark] .2How does the signal cross a synapse between two neurones?
[1 mark] .3Which part of this reflex is the effector?
[1 mark] 