51. Hemoglobin delivers O2 to body cells from the red blood cells a. until the hemoglobin is depleted of O2. b. until the partial pressures of O2 in the two different cells are equivalent. c. although the hemoglobin is never completely saturated. d. by releasing O2 to cells with a higher partial pressure of oxygen. e. until the fluid pressure in the red blood cells is lower.

the answer to your question is sperm

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.  

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what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements