Astudent would like to determine how heating a liquid changes its volume. the student hypothesizes that the liquid will increase in volume. the following list shows the steps taken by the student in order to test the hypothesis. select the liquid to test. place the liquid in a sealed container. use a bunsen burner to heat the liquid by 10°c. measure the volume of the liquid. record the results. what is wrong with how the student conducted the investigation? a. the student should have increased the temperature of the liquid by more than 10ºc. b. the volume of the liquid should be measured before it is heated. c. the length of time it took for the liquid to be heated should be measured. d. the hypothesis was not valid because it is impossible for liquids to change in volume.

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.

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Describe the function of the endomembrane system? what organelles are involved?