Which of the following is part of the light reaction of photosynthesis? a) productin of carbohydrates. b) splitting up of water molecules. c) release of carbon dioxide.

The Option B is correct.

The part of light reaction of photosynthesis is splitting up of water molecules.

Because, in the first step of light dependent reaction, Water and carbon dioxide enter into the leaf.

After that light hit the pigment in the membrane of thylakoid splitting H2O into O2 i.e water into Oxygen.

Hope so, this answer will help you..

i would go with b

cytokinesis occurs after telophase so that eliminates d

and the entire reason for cytokinesis is for cellular reproduction

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.