Approximately how often does a period of REM sleep occur?
a. every 30 minutes
b. every 60 minutes
c. every 90 minutes
d. every 120 minutes
e. once per night
C
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Extensive horizontal gene transfer between domains greatly simplifies the construction of phylogenetic trees.
Answer the following statement true (T) or false (F)
In June 2001 an announcement was made that a draft sequence of the ____________________ nucleotides in the human genome had been finished
a. 350 million b. 990 million c. 1.1 billion d. 3.2 billion e. 56 billion
If the nucleotide sequence of one strand of DNA is helix is 5'GCCTAA3', what would be the 3'-5' sequence on the complementary strand?
A. GCCTAA b. CGGAUU c. CGGATT d. ATTCGG e. TAAGCC
Which of the following organisms causes "red tides" and extensive fish kills?
a) amoeba b) ulva c) diatoms d) plasmodium e) dinoflagellates