You purified fragments of nuclear envelope from human fibroblasts by biochemical fractionation. you first decide to use electron microscopy to test for the presence of the nuclear lamina on these envelope fragments. which of the following structures would suggest the presence of the nuclear lamina?

a. "little bumps", presumably membrane proteins, at the surface of the inner membrane
b. two phospholipids bilayers ~300 and ~700 nm fibers an organized meshwork of ~ 10 nm fibers
c. large pores that span through both nuclear membranes

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

answer: i don't know

explanation:

you need to provide a picture, otherwise i can't tell you.

if you can provide one, i'd be more than happy to you with this!

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."    

1. is geographic distribution

2 is increasing complexity

3 is transitional forms