Which of the following statements are true? i. each white blood cell contains millions of hemoglobin molecules. ii. in a sample of blood, there are more red blood cells than white blood cells. iii. hiv destroys red blood cells. iv. all blood cells come from one pool of stem cells. a. ii and iv only b. i and iv only c. ii and iii only d. i, iii, and iv only e. i, ii, and iv only

Which statements about the fluid mosaic structure of a membrane are correct? select the three correct statements.which statements about the fluid mosaic structure of a membrane are correct? select the three correct statements.the framework of a membrane is a bilayer of phospholipids with their hydrophilic heads facing the aqueous environment inside and outside of the cell and their hydrophobic tails clustered in the center.because membranes are fluid, membrane proteins and phospholipids can drift about in the membrane.the diverse proteins found in and attached to membranes perform many important functions.the kinky tails of some proteins keep the membrane fluid by preventing the component molecules from packing solidly together.membranes include a mosaic, or mix, of carbohydrates embedded in a phospholipid bilayer.

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

Can someone give me the answer to this question? you so much