<span>HR-diagram the most populated.</span>
Answer:
frog
Explanation:
frogs live their first part of their lives in water so they need gills but after metamorphosis they live on land so they need lungs.
Answer:
carbondioxide last in about 300 to a 1000 years in the atmosphere
<span>When there is no oxygen, or the organism cannot use oxygen for respiration.
</span>
Answer:
Natural selection occurs when some of those traits help some individuals survive and reproduce more than others. That causes their genes to become more common in the population over time, and it's the way species evolve to adapt to changes in their environment.
Explanation:
hope this helps =)
