Which statement is TRUE of methanogenic and extremely halophilic Archaea?
A) The methanogens are obligate aerobes; the extreme halophiles are obligate anaerobes.
B) The methanogens are obligate anaerobes; the extreme halophiles are mostly obligate aerobes.
C) Both the methanogens and the extreme halophiles are obligate aerobes.
D) Both the methanogens and the extreme halophiles are obligate anaerobes.
Answer: B
You might also like to view...
In 1909, Charles Walcott discovered fossils in the Burgess Shale of the Canadian Rockies. The area was formed by an underwater mudslide that provided an oxygen free environment, so decomposition was minimal. Why was this site particularly important to the fossil record?
A. It contained fossils from the Cambrian period. B. It contained both vertebrate and invertebrate fossils. C. It contained fossils of well preserved soft tissues of invertebrates. D. It showed that mudslides could occur underwater. E. The first bird fossil, Archaeopteryx, was found here.
Branches of a bronchus are known as ____
a. larynx b. bronchi c. bronchioles d. trachea e. pharynx
Is it possible that the carbon atoms in your body may have once made up the living tissues of another person or animal in earlier times? This is
A. impossible since carbon can't enter a living system more than once. B. possible since carbon cycles through the biosphere. C. possible only if you are a cannibal. D. highly unlikely since carbon is always tied up in molecules in organisms or minerals.
If a species showed no senescence, could there be immortal organisms in nature? Limit your answer to one to two sentences
What will be an ideal response?