NEED HELP ASAP Explain why the fact that invasive species did not co-evolve with the native species unbalances an ecosystem.

The activity of the modern sample is 1.10 bq . how long does that measurement take?

One function of the poly-a tail on eukaryotic mrna sequences is to the mrna be transported from the nucleus to the cytoplasm. prokaryotic mrna also has a poly-a tail. choose the best explanation of the prokaryotic poly-a tail. a. prokaryotic poly-a tails are composed of a different molecular structure compared with eukaryotic poly-a tails. b. prokaryotic poly-a tails have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. c. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails have other functions,because prokaryotes don't have nuclei.

Which of these is one of the nitrogenous bases in dna? a. proline b. leucine c. glycine d. thymine