1. Semester Exam Revision
03/12/2015
Semester Exam Revision
Theories of Evolution
Adaptations of animals to desert environments
Adaptations of plants to desert and rain forest environments
Dichotomous Key
Classification of Vertebrate
Classification of Invertebrates

2. Invertebrates

3. Arthropods Insect Arachnid Crustacean Millipede Main Body Regions
Pairs of Legs
Pairs of Antenna
Wings
Insect three head thorax abdomen / three pairs of legs / one pair of antenna / 2 pairs of wings
Arachnid two cepalothorax abdomen / 4 pairs of legs / no antenna / no wings
Millipede 2 head and trunk / two pairs per body segment / 1 pair of antenna / no wings
Crstacean 2 cepalothorax and abdomen / 5 or more pairs of legs / 2 pairs of antenna / no wings

4. Vertebrates

5. 03/12/2015
Evolution
individuals in a species show a wide range of variation
this variation is because of differences in their genes
individuals with characteristics most suited to the environment are more likely to survive and reproduce
the genes that allow these individuals to be successful are passed to their offspring.

6. Evolution - Peppered Moths
03/12/2015
Evolution - Peppered Moths

7. 03/12/2015
Evolution - Lamarck
A characteristic which is used more and more by an organism becomes bigger and stronger, and one that is not used eventually disappears
Any feature of an organism that is improved through use is passed to its offspring.
Lamarck's theory cannot account for all the observations made about life on Earth. For instance, his theory implies that all organisms would gradually become complex, and simple organisms disappear. On the other hand, Darwin's theory can account for the continued presence of simple organisms.