Estion 4 (May/June 2016 P1) Research shows that the average age of first menstruation is influenced by
socio-economic status as well as race.
Scientists carried out an investigation to determine the average age of the first
menstruation of the girls in a community
Their hypothesis was
The average age of first menstruation has decreased over time.
2.5.1 For the investigation state the
(a) Independent variable
(b) Dependent variable
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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.