Plants respond to different kinds of stimuli. A plant's roots searching for water are an example of what kind of response?
A. thigmotropism
B. phototropism
C. hydrotropism
D. gravitropism

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Which of these best describes an ionic bond?

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.