Dr. Soult is studying the use of undifferentiated embryonic stem cells in the fight to cure leukemia. Which is a practical and ethical source for these building block cells?

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.