If dense bone lacked canaliculi:a
there would be no blood supply to the cells.
b. diffusion between cells would not be possible.
c. there would be no nerve supply to the tissue.
d. the extracellular matrix would not be formed by osteoblasts.
e. the osteoclasts would not be able to remodel the bone.
B
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All of the following statements about the brown algae are true except:a
this group includes the most complex algae that have blades, stipes, and holdfasts. b. they share a common ancestor with representatives of the plant kingdom. c. they represent the largest members of the algae called seaweeds. d. they are harvested for algin, which is used in a variety of commercial products. e. they are ecologically important as producers and in providing habitats along rocky coastlines.
Identify the following as participants in either specific or nonspecific immune responses, and for each provide a onesentence
explanation of its function or role. A. macrophages B. natural killer cells C. memory cells What will be an ideal response?
What is the key factor determining whether or not attenuation will occur when transcription of the E. coli trp operon has been initiated?
A. The trp operon repressor B. The activity level of adenyl cyclase C. The level of tryptophan in the environment D. The level of trp-tRNA that is charged with tryptophan
Peptidoglycan is a unique macromolecule found in bacterial
A. inclusions. B. capsules. C. slime layers. D. cell walls. E. cell membranes.