VOL. 44, 1958
BIOLOGY: MESELSON AND STAHL
Appearances of regeneration from naked masses of protoplasm have sometimes been noted, but never in examples in which it had been established that there were no small, fully formed cells from which the growth
0 out of 2 points
TB 10.092 Which polyploidization mechanism is thought to occur most often in plants?
Chromosomes spontaneously split down the middle during the G1 portion of the
2 out of 2 points
TB 8.127 What happens to the breakdown products of materials brought into many singlecelled organisms from the extracellular environment?
They are used as nutrients and are released into the cytoplasm.