gastrulation is the stage of embryonic development following cleavage. during gastrulation, cell division slows dramatically, and cells are rearranged in a precise way, forming three germ layers. the diagram below illustrates gastrulation in a frog embryo, represented in cross section.

The body of water found at number 4 on the map above is the

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes

Albinism is an autosomal recessive condition. which circle graph above shows the genotype probability when an albino female mates with a male that is heterozygous for the albinism trait? answer choice f answer choice g answer choice h answer choice j