Who is credited with the discovery of prions as a new biological principle of infection?
a. Anton van Leeuwenhoek
b. Dmitrii Ivanowsky
c. Stanley Prusiner
d. Stanley Brenner
e. Carl Woese
c
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How is the timing of gamete formation in females different than that in males?
What will be an ideal response?
The __________ gland produces hormones and is the site where __________ (a kind of white blood cell) mature.
Fill in the blank(s) with the appropriate word(s).
NASA Scientists send a small population of dogs to a new planet in order to test if it will be hospitable for human colonization. Through a random lottery, only Great Dane and St. Bernard dog breeds are sent, and the resulting population consists of tall, longhaired dogs. After 100 years these dogs return to Earth and are no longer able to mate with Earth dogs. This scenario is an example of
A. sympatric speciation through genetic drift. B. sympatric speciation through natural selection. C. allopatric speciation through genetic drift. D. allopatric speciation through natural selection.
Macromolecules are made up of smaller subunits called
A. Monomers B. Polymers C. Isomers D. Cells E. Aggregates