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Biology, 22.06.2019 23:00, alina1120
Nitrogen-14 and nitrogen-15 are isotopes of the same element. how do these two isotopes differ? a. they have different numbers of nuclei. b. they have different numbers of protons. c. they have different numbers of neutrons. d. they have different numbers of electrons.
Answers: 2
Biology, 22.06.2019 23:40, dani19cano
Attached earlobes are a reccesive trait in humans. in the tree below, people with attached earlobes are shaded in. which best describes labeled x in the tree? a: a female with one recessive allele b: a female with no recessive allelesc: a male with no recessive allelesd: a male with one recessive allele
Answers: 1
Como obtienen y utilizan las células la energía que necesitan para sobrevivir?...
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