Compute the number of chromosomes that the gametes of a cat (2n=38 chromosomes) will have.

19

Explanation:

The process of meiosis can be described as a cell division process in which the number of chromosomes gets half in gametes. This is because the daughter cell will receive half the set of chromosome from one parent and the other half from the other parent.

If the diploid number of chromosomes is 38 in cats, then the gametes formed will have 38/2 number of gametes. Hence, the answer is 19.

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.