Red blood cells carry oxygen to all cells and carbon dioxide away from all cells. They travel through all the blood vessels of the circulatory system, including the
microscopic capillaries which connect arteries to veins. How does the design of a
human red blood cell fit its function?
The shape or design of a blood cell matches its function by...

Biconcave shape

Explanation:

A red blood cell has what is known as a biconcave shape. Both sides of the cell's surface curve inward like the interior of a sphere. This shape aids in a red blood cell's ability to maneuver through tiny blood vessels to deliver oxygen to organs and tissues.

the overall balanced equation

6co2 + 6h2o > c6h12o6 + 6o2

sunlight energy

where: co2 = carbon dioxide

h2o = water

light energy is required

c6h12o6 = glucose

o2 = oxygen

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation: