Which represents the collection of chemical reactions that occur in a cell? atp assembly metabolism growth and repair reproduction

I took the same test the answer is metabolism

The right answer is metabolism.

Metabolism defines the set of coupled reactions occurring in the cells of the body. It consists of two opposing mechanisms:

* Catabolism: it allows the extraction of energy from nutrients, by degradation of energy molecules (carbohydrates, lipids ...);

* Anabolism: it allows to synthesize the constituents necessary for the structure and the proper functioning of the cells.

Basal metabolism is also contrasted with metabolism in activity.

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.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.