We're looking at adaptations that plants and animals have to help them survive and reproduce. We completed a practical looking at how size can help animals in different environments. We concluded that (although some of our groups didn't work because of different water temperatures) smaller animals have a greater surface area:volume ratio and so cool down more quickly.
With plants, we defined transpiration, xylem and stomata. You should all be able to use these in describing how plants are adapted to certain environments. With the celery experiment we found that water moves up through the roots and xylem, then out through the stomata in the leaves. Plants in warm conditions can lose too much water, so either have sunken stomata or less of them (or close the ones they do have). Plants also have other adaptations to help them in hot environments, such as waxy outer layers to prevent water loss, thin leaves and stems that can store water (like a cactus).
This page from bitesize has some good information about adaptations ion hot and cold climates if you skip to the next page down the bottom - http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/evolution/organismsrev2.shtml
If you have time, try some of the exam style questions from the textbook on the kerboodle website, page 92-3.
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