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.

Agene with the original sequence of atgtt—tact underwent substitution mutation to form atatt—tact after a few generations. tact is a part of a muscle protein encoding region, and atgtt codes for a digestive enzyme. what will be the effect of this mutation? a. the production of muscle protein will be affected. b. the production of digestive enzymes will be affected. c. the production of both the protein and the enzyme will be affected. d. the production of neither the protein nor the enzyme will be affected.

Always use significant figure rules. remember that these rules apply to all numbers that are measurements. a car travels 6 miles north, 3 miles east, and then 2 miles south. what is the distance traveled? a.7 b.11

Donde se encuentra el adn nuclear en un organismo eucariota?