8. A scoop of ammonium nitrate is added to a beaker of water. Which is a quantitative observation of the experiment? A. The ammonium nitrate dissolved in the water.
B. The temperature of the water decreased by 5°C.
C. A chemical reaction occurred.
D. The solution did not change color.

The correct answer is B. The temperature of the water decreased by 5°C

Explanation:

Temperature and the changes in it are part of quantitative observations because these can only be measured and understood through numbers. Indeed, the temperature is globally measured through different numerical scales such as the Celsius or the Kelvin scale. This does not occur in other qualities such as color because this is considered and analyzing using qualities or traits rather than values. According to this, the correct answer is "The temperature of the water decreased by 5°C."

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

the fossil record provides evidence of a common ancestor to many species.