Genetically distinct populations of squirrels on the northern and southern rims of the Grand Canyon can be considered an example of sympatric speciation

a. true
b. false


Answer: b. false

Biology & Microbiology

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The use of a physical or chemical process to destroy vegetative pathogens on inanimate objects is ________.

A. disinfection B. sterilization C. sanitization D. antisepsis E. degermation

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The chorion is the extraembryonic membrane closest to the embryo proper. Indicate whether the statement is true or false

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The majority of the staphylococci isolated from human skin are coagulase-positive

Indicate whether the statement is true or false

Biology & Microbiology

Which of the following genetic disorders is due to a lack of the lysosome enzyme hex A?

A. Marfan syndrome B. cystic fibrosis C. Tay-Sachs disease D. Huntington disease E. sickle-cell disease

Biology & Microbiology