A gas has a volume of 15 L, a temperature of 300 K, and an unknown initial pressure. Then, the
gas expands to 30 L, remains at 300 K, and has a
pressure of 300 kPa. What was the initial pressure
of the gas?
a. 150 kPa
b. 600 kPa
330 kPa
d. 570 kPa
C.

Charles darwin published his theory of evolution in 1859. in what way foes modern evolutionary theory differ from the theory as proposed by darwin? a) darwin inferred that individuals can evolve, but modern generic science has shown that this is not true. b)darwin inferred that individuals do not evolve, but modern genetic science has shown that this is not true. c)modern science has disproved most of darwin's original theory of evolution, because darwin knew nothing about generations and their role in heredity. d)generic studies have shown that gene expression and other factors operate along with natural selection, but most of darwin's theory has been supported by modern science.

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis

When a cell is in a solution that has the same concentration of water and solutes as its cytoplasm, the cell is said to be in a(n) solution. a. isotonic b. hypotonic c. hypertonic b. facilitated