In biology lab, your instructor informs you that carbon-14 dating will demonstrate the use of determining the age of a fossil. Using only this information, you estimate that the age of the fossil must be less than about years old.
A. 75,000
B. 1.3 billion
C. 40,000
D. 100,000
E. 300,000
C. 40,000
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Systematists aided in the effort to eradicate malaria from Europe by ____
a. developing insecticides to kill mosquitoes b. categorizing mosquitoes into six species c. discovering that all mosquitoes breed in standing water d. cloning the genes of the malaria pathogen e. identifying Plasmodium as the parasite that causes malaria
In humans, skin color is controlled by several genes. Thus, skin color is a(n) ____ characteristic.
a. dominant b. co-dominant c. epistatic d. pleiotropic e. recessive
The methanogenic archaeans belong are ____
a. aerobes b. facultative anaerobes c. strict aerobes d. facultative anaerobes e. strict anaerobes
Why did the length of the first leg of the voyage vary so much?