Answer:
Natural selection can cause microevolution (change in allele frequencies).
Explanation:
With fitness-increasing alleles becoming more common in the population.
A dichotomous key involves 3 keys
Answer:
last one
Explanation:
because you having digestive have nothing to do with your oxygen and breathing
Explanation:
carbon dioxide is added are the atmosphere naturally with organisms respire or decompose carbonate rocks are weathered,forests fires occur,and volcanoes eript.Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossils fuels and forests and the production of cement.
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