Hair-like canals that connect lacunae to each other and to central canal
What will be an ideal response?
Canaliculi
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An E. coli strain has been found to constitutively express the lac operon despite the presence of the Lac repressor and absence of allolactose. It would be appropriate to surmise that a mutation in the Lac repressor has:
A. increased the Kd of the repressor. B. decreased the Kd of the repressor. C. increased binding of the repressor to DNA. D. increased binding of allolactose to the repressor. E. increased the rate of growth of E. coli.
The mitochondrion harnesses the energy of the flow
of __________ from its __________ compartment to its __________ compartment to generate ATP. a. CO2; outer; inner b. H+; outer; inner c. H+; inner; outer d. H2O2; outer; inner e. CO2; inner; outer
Which of the following characteristics are expected in the first animals to have colonized land?
1. were probably herbivores (ate photosynthesizers) 2. had four appendages 3. had the ability to resist dehydration 4. had lobe-finned fishes as ancestors 5. were invertebrates A) 3 only B) 3 and 5 C) 1, 3, and 5 D) 1, 2, 3, and 4
The parts of the central nervous system are the:
A) afferent and efferent. B) brain and spinal cord. C) nerves and receptors. D) autonomic and somatic.