Which of the following statements is true?

Electrons have a negative charge.

The n=1 shell can hold eight electrons.

The number of electrons in an atom is equal to the number of neutrons.

The second electron shell can hold 16 electrons.

Why do antibiotics become less effective overtime?

Individual protein subunits of microtubules are held together by

Contrasting stimuli are extremely ineffective in getting attention. a. True b. False

The sympathetic nervous system and the parasympathetic nervous system are specific divisions of the what

Bacteria and Archaea. How are they alike? How are they differe

How does the mutualistic relationship between legumes and rhizobia benefit both organisms? Can you think of other mutualistic relationships?

Which of the following could be a method used to estimate the age of an ancient rock? To find out its mineral composition To find the age of the fossils trapped in it To calculate the amount of C-14 atoms left in it To calculate the number of

What happens when a mutation occurs?

What macromolecule is the primary energy source for organisms?

If oil from the Canadian sands is so difficult to extract, why does Conoco Phillips bother?