Which of the following describes passive immunity?  

A.  antibodies transferred to the fetus from the mother across the placenta
B.  vaccination for polio
C.  allowing oneself to become infected with chicken pox
D.  vaccination for influenza
E.  catching a common cold


A.  antibodies transferred to the fetus from the mother across the placenta

Biology & Microbiology

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Sperm are produced in the ____

a. epididymis b. seminiferous tubules c. penis d. prostate gland e. vas deferens

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The interaction of two or more polypeptide chains in a hemoglobin molecule is its ____ structure

a. primary b. secondary c. tertiary d. quaternary e. combined

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What is the name given to the fluid removed from the blood but not yet processed by the nephron

tubules? a. urine b. water c. uretrial fluid d. glomerular filtrate e. renal plasma

Biology & Microbiology

Factors which provide a measure of biodiversity in a particular ecosystem include

A) the total number of species in that ecosystem B) the variability of the individual genes C) the relative abundance of each species D) the number of different habitats being utilized E) All of the choices are correct.

Biology & Microbiology