Answer:
Changes in the environment may leave individuals less well adapted to compete successfully for resources such as food, water and mates. Sometimes an entire species may become unable to compete successfully and reproduce. These problems can lead to extinction.
The blood carries carbon dioxide away from the cells
It reveals that they have relationships of being friends.
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The greenhouse effect is a process that occurs when gases in Earth's atmosphere trap the Sun's heat. This process makes Earth much warmer than it would be without an atmosphere. The greenhouse effect is one of the things that makes Earth a comfortable place to live
Answer:
Aerobic processes in cellular respiration can only occur if oxygen is present.
Explanation:
