How many of the listed events are post-transcriptional processes that occur after transcription starts but before translation begins in eukaryotes? Addition of a poly-A tail on the 3' end mRNA export to the cytoplasm Scanning down the 5' end of mRNA to locate the first AUG Addition of a 5' cap Promoter binding of RNA polymerase Base pairing between the initiator tRNA anticodon and the start codon Peptide bond formation Binding of the large subunit with the small subunit of ribosome Splicing to remove introns and join exons together

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it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.

b. to discover aspects of the natural world.

hopefully i .