32 Jillian wants to know which type of antibiotic is most effective in killing a certain type of bacteria, so she performs the following
experiment
Jillian grows cultures of the bacteria on petri plates. Each plate is covered with the same number of bacterial colonies--100
colonies per plate
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Perbere nga
Jillian then applies 1 mL of four different types of antibiotic to the different plates. The plates are incubated in the dark at the same
temperature and humidity for one week Jillian records the number of colonies that remain on each plate at the end of each day
during the week Her results appear below
Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7
Plate 1 100 90 80 70 60 50 40
Plate 2 100 87
69 55 43 43 43
Plate 3 100 95 110 125 150 138 104
Plate 4 100 50 37 16 0 0 0
What is the outcome vanable (dependent variable) in Jillian's experiment?
OA. the initial number of bacterial colonies
B. the number of bacterial colonies that remain
OC. the type of bacteria that is being tested
OD. the type of antibiotic that is used

What volume of a 0.25 m solution can be made using 0.55 moles of ca(oh)2

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.

Sexual reproduction in the parent cell will result in offspring with a) identical genetic information. b) half the genetic information. c) double the genetic information. d) four times the genetic information.