Mitochondrial dna can be taken from bone, hair, or teeth and used in dna typing. what are the benefits to using mitochondrial dna over nuclear dna? mtdna requires a much smaller sample than nuclear dna. mtdna is useful if the nuclear dna is degraded. mtdna is inherited from the mother and father’s egg cells, unlike nuclear dna. mtdna is present in all maternal relatives of the person being investigated.

Athermometer is placed in water in order to measure the water’s temperature. what would cause the liquid in the thermometer to rise?

On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d