Point mutations occur when a. one nucleotide is replaced with a different nucleotide. b. a gene's location changes. c. gametes are formed during meiosis. d. long segments of a gene are lost.

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Time ! for a smell to begin the process of registering in your brain, first you must a) inhale odor molecules into the nasal cavity b)transduce scent chemicals c)have a scent to inhale d)all answers can work

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons