Biology, 14.01.2021 22:30, emmalybrown
Max tried an experiment in which he added red-dyed salt water to clear freshwater. He noticed that a lot of the red water sank below the clear water. Which of the following statements explains why this happened?
Adding salt to water makes it more dense.
Adding salt to water makes it less dense.
Adding salt to water decreases its temperature.
Adding salt to water increases its temperature.
Answers: 1
Biology, 22.06.2019 03:00, babbybronx
Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point
Answers: 1
Biology, 22.06.2019 13:20, abolton04
Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.
Answers: 1
Max tried an experiment in which he added red-dyed salt water to clear freshwater. He noticed that a...
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