How many chromosomes do parents pass onto their offspring?

During convection, less dense fluid rises and denser fluid sinks.

True or false: (a) the strings of little red dots represent carbohydrates. (b) the model is called a bilayer because there are two main types of molecules present, lipids and proteins. (c) the many black lines represent amino acid tails. (d) this model shows membrane transport. (e) the blue ovals are hydrophobic. (f) the blue ovals represent phospholipid heads.

What does the number 18.9984 represent in the image?