Prokaryotic cells evolved about ________ years ago
Fill in the blank(s) with correct word
3.5 billion
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In which of the types of hearts is oxygen-rich
and oxygen-poor blood mixed?
a. two-chambered b. three-chambered c. four-chambered d. two and three-chambered e. all three types of hearts
The Internet has been used as a rapid means to obtain information, including scientific ideas. Which one of the following statements about the Internet as a source of scientific information is FALSE?
A) At present, the Internet is less regulated than broadcast and print media. B) Anyone can post "scientific" information, regardless of whether the information is misleading or not true. C) Information on the Internet is generally very reliable because inaccurate information is quickly removed or corrected. D) Individuals and/or groups may post information to promote their own personal interests rather than ideas that have been tested through the scientific process.
Populations that have been relatively undisturbed by humans normally grow, with no limits set by their environments
Indicate whether the statement is true or false
The West Nile virus is classified as a(n)
A) rhinovirus. B) coronavirus. C) togavirus. D) flavivirus. E) enterovirus.