5. Cerebrospinal fluid is A) is secreted by ependymal cells.
B) is formed by a passive process.
C) is normally produced twice as fast as it is removed.
D) has almost the same composition as blood plasma.
E) contains blood cells and blood plasma

The energy required to vaporize a certain amount of a substance is greater than the amount of energy necessary to raise the temperature of the same amout of that substance by 1 degreee celcius

Why did the federal government end its support of yucca mountain as a site for long-term storage of nuclear water

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes