Lichens of the supralittoral fringe are compound associations between:
a. algae and bacteria.
b. fungi and bacteria.
c. bacteria and cyanobacteria.
d. fungi and algae.
e. algae and cyanobacteria
D
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Plant root nodules are
A) formed from gall-rotting bacteria that decompose plant roots. B) harmful to plants, because the bacteria outcompete the plants for nutrients. C) sites where nitrogen fixation occurs. D) structures created by fungi and are found in all agricultural crops.
What is the role of the apical complex in apicomplexans?
A. The apical complex is a defensive structure that is used to destroy bacteria. B. The apical complex enables the apicomplexan to penetrate and bore into a host cell. C. The apical complex is a motility structure that enables cell movement. D. The apical complex is a feeding structure through which small food particles are taken in.
Self-reactive B cells are removed during embryonic development in the bone marrow through a process referred to as ________ selection.
A. ablative B. positive C. negative D. clonal
________ are formed by certain bacteria that convert iron to magnetite; these structures are of interest to ________ because they are despite the fact that they are perfectly formed despite the fact they are only tens of nanometers in diameter.
What will be an ideal response?