Which lymphoid organ(s) serve(s) as the site where b lymphocytes become immunocompetent b cells? which lymphoid organ(s) serve(s) as the site where b lymphocytes become immunocompetent b cells? red bone marrow thyroid gland tonsils thymus gland?

You need to make 500ml of 7h9(+) media with 1x adn and 30ug/ml of the antibiotic kanamycin. your stock solutions are 10x adn and 30mg/ml of kanamycin. the solvent is distilled water. how much of each component will you need to make the desired final solution?

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits

What are the student's observations and inferences before he starts his investigation?