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Igneous rocks like pumice have holes because the maga/lava cools quickly, trapping air and gas bubbles inside.
Explanation:
Hope this helps u :D
Answer:
The biological levels of organization of living things arranged from the simplest to most complex are: Organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere
Answer:
If twins are a boy and a girl, clearly they are fraternal twins, as they do not have the same DNA. A boy has XY chromosomes and a girl has XX chromosomes. Girl-boy twins occur when one X egg is fertilized with an X sperm, and a Y sperm fertilizes the other X egg.
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Answer:
C. The number of differences in a specific DNA sequence of two species is multiplied by a known mutation rate to determine the number of years of evolution that separate the two species.
Explanation:
This is the best explanation of a way that a molecular clock can be used!
