Plz
which statement about this diagram is correct?
a) molecule 1 is dna because it is a double helix.
b) molecule 1 is rna because it contains thymine.
c) molecule 2 is rna because it is the only molecule that contains four types of bases.
d) molecule 2 is dna because it can pair with another molecule.

The right statement about the diagram is a) Molecule 1 is DNA because it is a double helix.

Explanation:

DNA and RNA are nucleic acids that are composed by desoxinucleotids and ribonucleotids, respectibly. DNA is characterized by a double strand while RNA has a simple strand. Another difference between them is the kind of nitrogen bases each contain: DNA has Adenine, Thymine, Cytosine and Guanine while RNA is formed by Adenine, Uracil, Cytosine and Guanine. It means that both contain four bases but in RNA Thymine is replaced by Uracil.

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.

the answer is c on e2020, bud.