b) some bacteria reduce nitrate ion
11 atoms hope this helps!
Answer:
since only 10% is passed you multiple the number given by .10
Explanation:
so 35,000*.10=3500 which is the first blank and you multiply that by .10 to get 350 and thats the second blank, then do that again to get 35 and then again and you get 3.5
Answer is Middle Paleozoic era.
Paleozoic era was in 542 Ma - 245 Ma and it has 6 periods as Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian.
360-280 Ma - forming of vascular plants with woody tissues, seeds and veins.
430 - 410 Ma - forming of jawed fishes and first amphibians.
420 Ma - forming of scorpions
360 Ma - forming of crustaceans.
Scanning electron microscope- this is a type of microscope that uses beams of electrons to view the surface of a specimen. it is used to provide a three-dimensional image of cells
transmission electron microscope- uses beams of electrons to examine the insides of thin slices of materials. it is used to provide a two-dimensional image of cell structures
