Because of the low penetration power of electrons, samples for transmission electron microscopy must be extremely thin. A(n) ________ is able to cut sections as thin as 20 nm

Fill in the blank with correct word.


Answer: ultramicrotome

Biology & Microbiology

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Inadequate drainage can lead to a buildup of excess salts in the soil

a. True b. False

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The glycocalyx is:

A. combination of proteins and lipids that protrude from the external surface of the plasma membrane B. combination of glycoproteins and glycolipids that protrude from the external surface of the plasma membrane C. combination of glycoproteins and carbohydrates that protrude from the external surface of the plasma membrane D. combination of lipoproteins an carbohydrates that protrude from the external surface of the plasma membrane E. combination of glycoproteins and cholesterol that protrude from the external surface of the plasma membrane

Biology & Microbiology

Eutrophication of a lake could occur if

A) phosphate-rich detergents were dumped into the lake. B) fertilizers were applied in an insoluble form. C) runoff from overfertilized lawns was prevented from reaching the lake. D) fish were removed.

Biology & Microbiology

K, in population growth equations, refers to:

A) the predation factor. B) environmental resistance. C) carrying capacity. D) biotic potential.

Biology & Microbiology