Which of the following is found in eukaryotic cells but not in the cells of bacteria?
A. nucleus
B. mitochondria
C. endoplasmic reticulum
D. lysosomes
E. All of the choices are correct.
Ans: E. All of the choices are correct.
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The conversion of nitrate (NO3-) to nitrogen gas (N2) is called
A. photosynthesis. B. denitrification. C. nitrification. D. ammonification. E. nitrogen fixation.
Resting zone
What will be an ideal response?
One possible reason that there are not any really large insects currently living on Earth is that
A. gas exchange across their moist skin surfaces cannot support the metabolic needs of a large body. B. they do not have as many papulae as echinoderms. C. their gills do not have as many lamellae as fish gills. D. the bulk flow of air through their tracheal tubes would be more difficult the larger the body and longer the tracheal tubes. E. their lungs never evolved to be as highly branched as a mammal's. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about respiration in insects? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A Gram-positive psychrotrophic rod ________ is a frequent contaminant of dairy products and meat and an opportunistic pathogen of the immunocompromised
A) Escherichia coli B) Helicobacter pylori C) Clostridium perfringens D) Bacillus thuringiensis E) Listeria monocytogenes