In a species of tortoise, foot size (big or smal) is controlled by one gene, while shell shape (round or lumpy) is controlled by another gene. Suppose that a big-footed lumpy-shelled tortoise mates with a small-footed round-shelled tortoise. Eight offspring result: four big-footed round-shelled tortoises and four small-footed round-shelled tortoises. (Assume that the parents are not necessarily homozygous for each allele.)
1. Which statement about the inheritance of shell shape in tortoises is most likely to be correct, given your genetic analysis of the tortoise family?
A) Lumpy is dominant to round
B) Round is dominant to lumpy
C) Round and lumpy are codominant.
D) Shell shape is an example of blending inheritance
E) This cannot be answered without more information.
2. If big feet (B) in tortoises is dominant to small feet (b), what is the genotype of the big-footed parent with respect to the foot gene?
A) bb
B) вв
C) Bb
D) Either bb or BB
E) Either bb and Bl

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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.

a covalent bond, specfically triple bond