Which of the following best describes cyanobacteria?
A. They all can use H2S as a source of electrons for photosynthesis.
B. Their photosynthetic pigments are carried in chlorosomes.
C. They carry out anoxygenic photosynthesis.
D. They carry out oxygenic photosynthesis.
Answer: D
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The autoimmune response to desmosomes or desmosomal components (not hemidesmosomes) leads to a blistering skin disease known as
A) pemphigus. B) Ehlers?Danos syndrome. C) syndecan. D) junctional epidermolysis bullosa. E) listeriosis.
Nitrogen gas is first converted into ___ by
certain___ before it enters the land nitrogen cycle.
a. nitrate...bacteria b. ammonium...bacteria c. elemental nitrogen...bacteria d. nitrate...bacteria and fungi e. ammonium...bacteria and fungi
What characterizes a thermocline in a temperate zone lake?
1.The layer above it is warm and has lots of oxygen. 2.The layer below it contains the warmest water. 3.It occurs in the spring as the air warms and ice melts. 4.It is very rich in oxygen.
What action may be part of the scientific method?
What will be an ideal response?