Which makes up the mobile phase used in gas chromatography

A. liquid nitrogen

B. silica gel

C. filter paper

D. a gas

What hormone causes breast development and production of milk?

Which of the following colors of soil is the best for a wildlife habitat?

A sample of mithril has a mass of 120 g and a volume of 60 mL. What is its density?

A change in an organisms genetic code is called what

True or False: All living organisms have cell membranes.

I think houseplants improve the quality of indoor air.

State the importance of the following responses: (a) Chemo-taxis in pollen grains (b) Positive rheotaxis in butterfly (c) Positive aerotaxis to aerobic bacteria.

Why do different mutations accumulate in two species once they diverge? select one: a. convergent evolution causes the difference in mutations. b. natural selection favors mutations in one species over another. c.

Tenho uma dúvida sobre uma coisa, por favor me expliquem para onde vai a água da chuva que cai sobre a areia, já que dificilmente vemos se formarem poças e por que vão pra esse lugar?

Beginning with newly-formed igneous rock describe the processes and paths that could move the material through the rock cycle until it again forms newly cooled igneous rock