Vestigial

                                                    25. Vestigial

Vestigial refers to an organ that is not functional anymore, but used to be used by ancient ancestors. Vestigial organs provide a clue to what ancestors that animal or human was derived from. On my dog, his dew claw is a vestigial organ. A dew claw is the fifth claw on most dogs paws that is higher up on the leg than the other four claws. Most of the time his claw does not touch the ground and is useless is providing traction to the dog. 

Hydrophobic

                                                    24. Hydrophobic

This bottle of oil represents the term hydrophobic. Hydrophobic means repelling  water or insoluble in water. Oil is considered hydrophobic because when you try to mix it with water it will never mix. There will always be little bubbles of oil floating within the water. This is also because water is polar and oil in non polar. The water and oil molecules are not attracted to each other.

Adaptation of a plant

                                                    23. Adaptation of a plant

This is an apple and it represents the adaptation of a plant. Seeds are protected inside the flesh of the fruit. Animals then eat the fruit and the seed goes through their digestive tract. The seed is then dropped in another location to then grow into another plant. Many plants have adapted to this way of reproduction especially those that live on land and have no other way of dispersing their seeds for reproduction.