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I really dunno how to help, just been lounging around all afternoon moiself :blush:

lucky you, how did your exam go?

Fine, I thinks. How was yours?

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I really dunno how to help, just been lounging around all afternoon moiself :blush:

lucky you, how did your exam go?

Fine, I thinks. How was yours?

 

 

went well, hoping for a really nice mark

sickle cell anaemia calls red blood cells to be sickle shaped, they may block up blood vessels and are less effective at carrying oxygen.

 

It can cause anaemia (fatigue), pain, damage to organs such as the spleen, strokes

Darwin's four observations:

All organisms produce more offspring than are needed to replace the parents

Population sizes remain more or less constant in number

Organisms in the same species show variation of traits

Some traits can be passed on to offspring and so are inheritable

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