What is the main form of nitrogenous waste that is excreted from Malpighian tubules?

a. urea
b. uric acid
c. ammonia
d. nitrate


Ans: b. uric acid

Biology & Microbiology

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A blastomere is a ________ and a blastocyst is ________.

A) fetal organ produced by cleavage; an embryonic organ produced by cleavage B) fetal membrane; an embryonic membrane C) cell produced by cleavage; a hollow ball of cells D) solid ball of cells; three-layered embryo

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Which of the following allows water to move much faster across cell membranes?

A) the sodium-potassium pump B) ATP C) peripheral proteins D) aquaporins

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Urine has some antimicrobial effects because of its

a) flushing action. b) alkalinity. c) enzyme content. d) antibody content.

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DNA polymerase is the enzyme that adds nucleotides to make a new strand of DNA. It requires an older strand of DNA to serve as a template, or guide

Answer the following statement(s) true (T) or false (F)

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