State whether each of the following statements is true or false, and explain your choice: a. The chromosomes in a somatic cell of any organism are all morphologically alike. b. During mitosis, the chromosomes divide and the resulting sister chromatids separate at anaphase, ending up in two nuclei, each of which has the same number of chromosomes as the parental cell.

a. The chromosomes in a somatic cell of any organism are all morphologically alike FALSE

Somatic cells have autosomal chromosomes and also carry sex chromosomes. These chromosomes are in pairs and each pair is morphologically different from the other pairs because they have differences in the size and the position of the center. It  allows them to be differentiated from others, this can be made evident by a karyotype.

b. During mitosis, the chromosomes divide and the resulting sister chromatids separate at anaphase, ending up in two nuclei, each of which has the same number of chromosomes as the parental cell. TRUE

During the anaphase there is separation of the sister chromatids. At the end of the anaphase, a complete set of chromosomes is grouped at the cell's poles. The mitosis process produces two daughter cells with the same genetic material to the progenitor cell.

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.