Millions of nonnative cattle in australia produce a huge amount of dung. for decades, australia has imported nonnative dung beetles to clean up the dung. which sentence best explains why australia would introduce nonnative species of dung beetle into their country? a. no decomposers exist in australia because they have no niche. b. native australian dung beetles lack a niche in australia. c. cows have no known niche in australia. d. cow dung is not part of any native australian species' niche

Correct D). Cow dung is not part of any native Australian species' niche

The beetles in Australia had formed along with the kangaroos and wombats. When the cattle are brought to Australia in the 1880. The beetles were not used to the texture of dung. It was quite different and the dung was not decomposing. Native beetles were not using this type of dung as a feeding source. Because of this cattle were not able to feed the pasture because they were not be able to eat near the dung.    

Hence, the correct answer would be option D.

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explanation:

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step 1: initiation

initiation is the beginning of transcription. it occurs 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.

step 2: elongation

elongation 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.

step 3: termination

termination 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.