If an atom was a scale, in which the nucleus is the size of an apple the electron

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn

If assuming tasting ptc as a simple gene trait,what other genotype would you select to put in this missing genotype box that could result in this phenotype

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?