Search over 10,000 free study notes

There is natural variation in the lengths of giraffes' necks. As there will be competition for food with other giraffes and other species, those with longer necks would r...

In a vaccination there are small quantities of a dead or inactive version of the pathogen.When you inject it into the individual's body ...

Plant and bacterial cells have a cell wall made of different material. Plant cell walls are primarily made of cellulose whereas bacterial cell walls are made of peptidoglycan. Animal cells lack cell walls...

A tissue.

• Leaves are broad with a large surface area so that they are exposed to more light and can maximize light absorption. - They are thin and flat so that carbon dioxide has a shorter distance to diffuse...