47 Which table shows two steps of DNA replication?
А
Step 1
DNA Polymerase matches uracil to
thymine and cytosine to guanine,
Step 2
Two identical DNA double helixes are
produced
B
Step 1
Step 2
DNA Polymerase matches cytosine to Two separate but complementary
thymine and uracil to guanine.. Single DNA strands are produced
С
Step 1
DNA Polymerase matches adenine to
thymine and cytosine to guanine.
Step 2
Two identical DNA double helixes are
produced
Step 1
DNA Polymerase matches uracil to
thymine and adenine to guanine.
Step 2
Two separate but complementary
single DNA strands are produced.

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

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.