Which of the following serves as a protective layer around mammalian eggs?

a. zona pellucida
b. lysosome
c. seminiferous tubule
d. endoderm


a. zona pellucida

Biology & Microbiology

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Secondary xylem is formed in association with the

a. pith. b. inner face of vascular cambium. c. outer face of vascular cambium. d. inner face of cork cambium. e. outer face of cork cambium.

Biology & Microbiology

An example of a(n) anabolic reaction is the splitting of a polysaccharide into monosaccharides

__________________ Indicate whether the statement is true or false.

Biology & Microbiology

Which test is used to measure the IgE present in allergic patients?

A.) fluorescent antibody tests B.) Rapid Plasma Reagin (RPR) test C.) Weil-Felix reaction D.) RIST E.) ELISA

Biology & Microbiology

Which order below reflects the correct procedure for Gram staining?

A. alcohol/acetone-crystal violet-safranin-iodine B. crystal violet-alcohol/acetone-iodine-safranin C. crystal violet-iodine-alcohol/acetone-safranin D. iodine-safranin-crystal violet-alcohol/acetone E. alcohol/acetone-safranin-crystal violet-iodine

Biology & Microbiology