What's mass?
a. the sum of the number of protons and neutrons in an atom
b. the force that gravity exerts upon an object
oc. a measure of an element's attraction for electrons
d. a measure of the amount of matter an object contains

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4