The major part of the average exposure of humans to radiation comes from

Coliforms A. are an informal grouping of enterics. B. ferment lactose. C. includes E. coli. D. are used as indicators of fecal contamination. E. All of the choices are correct.

What is the speed of a wave with a frequency of 0.2 Hz and a wavelength of 100 m

What organisms are responsible for cycling nitrogen from the atmosphere into soil and living things?

What were Darwin's views about the origin of species before he sailed on the beagle

Do you think blue feathers are dominant or recessive?

What is the polymer of lipids

Suppose you look at a microscope to look at a cell from leaf of a tree. What structure will you see that would not be found in a cell from you finger nail. A) cilia B) mitochondria C) ribosomes D) chloroplasts

Write the equation for photosynthesis using both words and the chemical symbols

Which change shows a tenfold increase in concentration of H + ions?

Which valve prevents backflow into the right atrium?