Meselson and stahl actually let their experiment run for a fourth generation with cultures growing in the presence of 14n. explain what data from third- and fourth-generation dna should look like—that is, where the dna band(s) should be.

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

Tides that occur during the new and full moons

Approximately percent of the energy created by cell metabolism is used by the body to carry on its normal functions, such as respiration, digestion, reproduction, muscular movement, circulation, and cellular regrowth.