Sodium is kept outside of cells and potassium inside them This fact will become important when we study muscle and nerve cells. Which of these things would you NOT expect to find on a muscle or nerve cell? Answers: An ATP powered pump that moves sodium against its concentration gradient/ An always open channel that lets sodium move down Ils concentration gradient /Agated channel that allows sodium in only at certain times

Me . based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?

Coat color in cats is determined by genes at several different loci. at one locus on the x chromosome, one allele (x ) encodes black fur and another allele (xo) encodes orange fur. females can be black (x x ), orange (xoxo), or a mixture of orange and black called tortoiseshell (x xo). males are either black (x y) or orange (xoy). bill has a female tortoiseshell cat named patches. one night, patches escapes from bill\'s house, spends the night out, and mates with a stray male. patches later gives birth to the following kittens: one orange male, one black male, two tortoiseshell females, and one orange female. what are the genotypes of patches, the stray male, and the kittens?

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?