Mrs. sail's class wanted to observe a local pond. the class collected some pond water to analyze. when they placed a drop of the water under a microscope, they saw many microorganisms in the water. the pond water looked clear when they collected it in the jar, so what could explain the presence of these organisms? a) they must have grown in the jar overnight. b) the microorganisms are too small to be seen with the naked eye. c) somehow, the jar was contaminated on the way from the pond to the class. d) the microorganisms only inhabit a very small section of the lake, and the class got lucky.

B) the microorganisms are to small too see with the naked eye

B. its more of a reliable answer because it's true. You cant see it with the naked eye if you had to put in under a microscope.

I might be wrong.

nanotechnology is a powerful tool in biomaterials research as it creates numerous possibilities for the engineering of functional molecules. nano-bio refers to projected ability to incorporate biomimicry into various materials at nanoscale.  

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".