Answer:
D but I'm not completely sure
Answer:
Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn, and Jupiter
Explanation:
<span>When we inhale
atmospheric air, through the nose it goes to the trachea and then via bronchus and bronchioles, it ultimately goes to the alveolus where the exchange of different gas takes place.</span>
Answer: It is A
Explanation: C and D are jokes/ complete lies. B is wrong because Darwin did observe that animals and plants adapted (evolved) to suit their environments.
The answer is variable. This is a vital part of any experiments and science projects this is basically any factor that can be controlled, changed, or measured in experimentation. Scientific experiments have quite a few types of variables. The independent variables are the ones frequently plotted on a chart or graph, but there are other kinds of variables you may come across like the dependent and controlled.