And so, he said, researchers have been able to use the study of lower organisms to cast light on the murkier realms of mammalian cells.

Sulfatases are found in lower and higher organisms.

In other words, these amino acids are widely distributed among the higher forms of life but are generally absent from lower organisms.

Then he decided, in spite of his theoretical belief that it was an organism too low for much pain, that it had better be killed.

He was a pampered, and fairly well spoiled, youngster, and that was very good for us lower organisms.

Kofeeshtetch didn't have a lot of use for lower organisms like me, either, but he had the same yearning to hear about exciting adventures.

"To risk your life for the sake of some lower organisms?"

If the results obtained with the lower organisms indicate what's in store, the normal human life span will eventually more than double, extending up to perhaps 200 years.

The gene is conserved among mammals and is not found in lower organisms.

No specific biochemical function has been identified for it in humans, although vanadium is required for some lower organisms.