en humanos, el gen que determina el color oscuro del pelo es dominante (P) frente al pelirrojo (p), el gen que determina el color pardo de los ojos (O) es dominante sobre el de los ojos azules (o). Un hombre de ojos pardos y pelo oscuro y una mujer tambien de pelo oscuro, pero de ojos azules, tuvieron dos hijos, uno de ellos pelirrojo y con ojos pardos, y el otro de pelo oscuro con ojos azules. representa este cruse , indicando los genotipo y los fenotipos . deduce los genotipos de su descendencia.​

the correct answer is - ability to find a mate

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.

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.