Select the correct text in the passage. Which two sentences describe unethical behavior by a scientist?
Donnie is a geology researcher at Baxter’s Laboratory in Seattle, Washington. 1.(He keeps his lab tidy; he believes that cleanliness and order help avoid expensive accidents that may occur in the lab.) 2.(Donnie is also very determined; he continues performing an experiment until he reaches the conclusion that he wants and expects.)
3.(Sometimes, when Donnie is unhappy with how an experiment has turned out, he chooses not to share his findings with the public or his colleagues.) 4.(But he always makes sure to put on goggles and follow the proper safety procedure before beginning an experiment.)

What are two ways in which waves erode the land?

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.

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