B, there are many ethical issues associated with stem cells.
Answer:
The plant types suitable during that period would be ferns, horsetails, and lycopods.
Explanation:
A geologic period and system, which covers 60 million years from the termination of the Devonian period to the start of the Permian period is known as the Carboniferous period. During the Carboniferous period, the plant life was luxuriant and extensive, mainly at the time of Pennsylvanian. It comprises ferns and fernlike trees, that is, the giant horsetails known as club mosses, calamites, or lycopods like Sigillaria and Lepidodendron.
Thus, if humans had been present to construct log structures during the Carboniferous period, then they would have used logs of ferns, horsetails, and lycopods for construction work.
Answer:
The Crainum fossils are the youngest fossils from 134 million years ago. The occur in the top layer of the earth's crust (rock)
Explanation:
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Bioluminescenct organisms exist in deeper ocean depths because the light is unable to reach them.
Nonsense mutations make stop codons. If the mutation is towards the beginning of a gene, then the protein that gets created will be cut short and not function properly. But if it was towards the end, there is still a chance that the protein will still be able to work.