Both of these birds were originally the same species. Overtime, however, the two birds began to live in different environments and eat different types of food. What were these changes in beak and feather color caused by? 1.Mutations

2.Variations

3.Clones

4.Extinctions

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water