Two intracellular molecules, x and y, are both normally synthesized at a constant rate of 1000 molecules per second per cell. molecule x is broken down slowly – each molecule of x survives on average for 100 seconds. molecule y is broken down 10 times faster – each molecule of y survives on average for 10 seconds. a) calculate how many molecules of x and y the cell contains at any time? and what if the rates of synthesis of both x and y are suddenly increased tenfold to 10,000 molecules per second per cell in response to a signaling cascade, without any changes in respective degradation rates, how many molecules of x and y will there be after one second?

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.