A model of tin, an element with the atomic number 50, is shown here. The valence electrons are modeled here in this image. Which statements are supported by the information in the model? Select ALL That apply. A) Tin needs four more electrons to complete its outer shell. B) Tin has no neutrons in the nucleus, as is shown in the model. C) Tin is highly reactive because it only has four valence electrons. D) Tin is negatively charged because it more electrons than protons. E) Tin has a low reactivity because it has full inner shells of electrons.

answer; a male inherits only one allele of the x-linked gene controlling hair color;

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms