Which continents contain coal fields that provide evidence for continental drift? check all that apply. africa eurasia antarctica south america north america

The correct answers are:

- Eurasia;

- North America;

- Africa;

- South America;

The coal fields can be found on every continent in the world, apart from Antarctica, but we should keep in mind that Antarctica is still not explored, so there's a high chance of having coal fields on it as well.

Most of the coal fields in the world are located in Eurasia, North America, and Australia. Even though there's coal fields in Africa and South America too, they are much less, and much smaller. Since the coal originates from a single geological period, the Carboniferous, and it is formed by specific types of trees, it is a nice evidence that the continents were all once merged together, where the same species of trees, in a same or similar environment, existed and died off, thus giving the material for the coal we use in the present.

A , B, D, E

Africa

Eurasia

South America

North America

Explanation:

Just took the test

b is the best answer for this question.

transcription is a process in which information is rewritten. it is something our cells must do, in a more specialized and narrowly defined way. in biology, transcription is the process of copying out the dna sequence of a gene in the similar alphabet of rna. it needs to happen in the nucleus because that's where the dna is. dna is always inside the nucleus unless the cell is dividing.

transcription is the first step in gene expression, which involves copying a gene's dna sequence to make an rna molecule. transcription is performed by rna polymerases. it has three stages: initiation, elongation, and termination. rna molecules must be processed after transcription in eukaryotes.

explanation:

long version:

the protein synthesis consists two processes which are, transcription and translation. transcription takes place in the nucleus. it uses dna as a template to make an rna molecule. rna then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. transcription is the first part of the central dogma of molecular biology: dna → rna. it is the transfer of genetic instructions in dna to messenger rna (mrna). during transcription, a strand of mrna is made that is complementary to a strand of dna.  

these three stages are:

  initiation: in which   is the beginning of transcription.occuring when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

    elongation: in which is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

    termination: in which is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.