What is the function of the following parts of a compound light microscope?

a. condenser lens:
b. iris diaphragm:
c. objective:
d. ocular:


a. condenser lens: with the iris diaphragm, focuses the light source on the specimen so that each of its points is evenly illuminated.
b. iris diaphragm: with the condenser lens, focuses the light source on the specimen so that each of its points is evenly illuminated.
c. objective: magnifying lens that scans specimen.
d. ocular: magnifying lens that you look through.

Biology & Microbiology

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Most mutations that affect developmental regulatory genes are ________________. 

Fill in the blank(s) with the appropriate word(s).

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Most deaths among endangered Florida panthers are caused by disease

Indicate whether the statement is true or false.

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A hydrogen bond is an attraction between a(n) ____ hydrogen atom and another hydrogen atom taking part in ____

a. covalently bonded; the same polar covalent bond b. ionically bonded; the same polar covalent bond c. covalently bonded; a separate polar covalent bond d. ionically bonded; a separate nonpolar covalent bond e. nonpolar covalently bonded; a separate nonpolar covalent bond

Biology & Microbiology

Membrane-bound vesicle that contains hydrolytic enzymes for digesting macromolecules and bacteria; used to recycle worn-out cellular organelles.

What will be an ideal response?

Biology & Microbiology