Which of the following organic molecules is a source of carbon, nitrogen, and phosphorus?
a) calcium carbonate
b)nucleic acids
c)ammonia

Chicken pox and hepatitis are bacterial diseases. true or false?

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic