The evolution of prezygotic barriers to reproduction after postzygotic barriers already exist is called ____
a. species fusion
b. reinforcement
c. adaptive radiation
d. geographic isolation
e. hybridization
ANSWER: b
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. Leprosy is
A. an infectious disease caused by a bacterium. B. a disease of the blood. C. also known as Hansen's disease. D. described in the Bible. E. an infectious disease caused by a bacterium, also known as Hansen's disease AND described in the Bible.
As global temperatures increase, Arctic sea ice
becomes thin and breaks up earlier each spring. What potential consequence described in the text might this directly lead to?
a. fewer migratory birds b. polar bears being stranded on ice flows far from land c. further global warming d. a decrease in Arctic sea levels e. an increase in polar bear populations
A culture medium consisting of agar, human blood, and beef heart is a:
A. None of the above B. Selective medium C. Complex medium D. Defined medium
Once organisms are classified as to their domain, there are still millions of different species in each domain. Subdividing them even further makes it easier to understand their relationships to each other. A domain is divided into more subgroups until genus species is reached. Which of the groups listed is the broader group (contains more members)?
A. Order. B. Class. C. Family. D. Phylum. E. Kingdom.