All but one describes an effect of aging on the respiratory system. a) diminished lung volume capacity b) increased respiratory mucus production c) decreases in respiratory muscle strength d) oxygen content of arterial blood decreases

1) this is the structure in the cell nucleus that houses a cell's genetic information

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.

Helium decays to form lithium. which equation correctly describes this decay?