Which of the following correctly describes the importance of an nitrogen cycle a. to recycle carbon-based compounds b. to replenish oxygen in the atmosphere c. to decompose dead animals d. to create ammonia that plants absorb

Hemoglobin is the compound in red blood cells that carries oxygen to the body. the distribution of hemoglobin in women in g/dl of blood is approximately normally distributed with mean 14 and standard deviation 1. too little hemoglobin, and you're anemic. 2. too much, and (unless you live at high altitudes), you can have other problems.

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome