I believe it would be "bones start to replace cartilage to form the beginnings of a skeleton" since that happens in months 7 and 8
The average length of a women's menstrual cycle can last 28 days.
the answer is D
In this case, brown frogs increase and green frogs decrease, whereas natural selection would cause this change in allele frequency.
<h3>What is natural selection?</h3>
Natural selection is the main evolutionary force by which populations change (evolve) across time.
Natural selection leads to the change in the allele frequencies depending on the more adapted phenotypes in a given environment.
In conclusion, brown frogs increase and green frogs decrease, whereas Natural selection would cause this change in allele frequency.
Learn more about natural selection here:
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Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Animals like a kangaroo rat has natrul defenses that help itself while living in the dune
