The lungs expand and with that you breathe in air as the diaphram contracts and relaxs to cause "breathing"
Trees that drop their leaves in colder seasons, in order to conserve water.
I’ll give you some key points and after that you should be fine, tide, swept underneath and over, density differences and climate change
Each chromosome contains one molecule.
Answer:
Survey
Explanation:
Because if you think about it carefully you really cant observe it. Your main goal is to compare them and with that we need a survey to get the data from both sides. Leaving us with the Survey