Years ago, scientists determined that all mitochondrial dna in humans came from a common african ancestor. based on this information, which of the following can be inferred? all modern humans evolved from one group of african h. sapiens. ancestors of h. sapiens all migrated from africa and evolved into different species. several populations of h. sapiens from different continents moved to africa. the mitochondrial dna of h. sapiens can evolve to form new species over millions of years.

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.

Which of the following describes a bathypelagic zone

Deserts (especially true deserts) are not easy places for animals to live. animals who live in them often have special features that them survive. which adaptation would be for this group of animals? a) keen eye sight b) short, narrow legs c) tolerate heat d) webbed feet