Ambient air, which contains 21% oxygen (O2) and a small amount (0.03%) of carbon dioxide (CO2), is the environmental condition that best suits which type of organism?
a. Aerobes
b. Anaerobes
c. Capnophiles
d. Microaerophiles
A
Various types of microorganisms require different atmospheric conditions. Aerobes grow best in the presence of ambient air.
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A point mutation that causes a premature stop codon is called a:
A. missense mutation. B. nonsense mutation. C. silent mutation. D. frameshift mutation.
Which of the following is not an amoeba?
A. Entamoeba histolytica B. Cryptosporidium species C. Acanthamoeba species D. Naegleria fowleri
For sperm to be able to penetrate the zona pellucida of the egg, enzymes are released from the ________
Fill in the blank(s) with correct word
Conducting tubes of phloem, composed of stacked living cells, are called ________________.
A. vessel elements B. sieve tubes C. tracheids D. sieve elements E. xylem tubes