Which of the following statements is incorrect about how the components of hemoglobin are recycled?
a. hemoglobin can be recycled only if phagocytized by macrophages.
b. each heme is stripped of its iron and converted to bilirubin, then excreted in bile.
c. the alpha and beta chains are released into the bloodstream for use by other cells.
d. iron ions are either stored in a phagocytic cell or circulate in the blood, bound to transferrin (a plasma protein).

The united states produces an average of 429 billion pounds of food annually. about 133 billion pounds of that food ends up as waste.the percentage of food that the united states wastes each year is %.

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.

What is the statement plant growth is affected by the color light