Answer: they allow air to enter lungs and also permits air into the body
Explanation:
Answer:
This observation would be quantitative.
Explanation:
This is quantitive because it says how many of what there is.
A. Carbon Dioxide and Water
Answer:D) The starch adapted flies and maltose adapted flies are not different species but a reproductive barrier is forming between the two populations
Explanation: differences have accumulated within the populations to isolate them reproductively. The flies have chosen to mate with those like them.