Give two symptoms of sickle-cell anaemia.
Breathing difficulty
Loss of weight
Tiredness
Fertility Problems
What is a species?
Humans
A kind or sort
a group of living organisms that have similar individuals capable of exchanging genes or interbreeding.
The environment that organism live and grow in also causes difference between members of the same species this is called speciation
What is a reflex arc?
Rainbow
An automatic response and prevent a chance of injury
Change the environment area
Passage informations
When a stimulus detects a receptor
