4. Which of the following factors determines the sex of an offspring, specifically in humans? A) genes on the X chromosome only

B) the number or chromosomes

C) presence or absence of a Y chromosome

D) genes within the chromosomes

The friction red blood cells encounter when moving past each other. cardiac output: the amount of friction blood encounters during flow through blood vessels. blood pressure: the force of the blood against the vessel wall. blood viscosity: the volume of blood pumped out by one ventricle each minute.

2. which is the last step in the scientific method?

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)