The use of salt and sugar in preserving various types of foods is an application of which of the following concepts?
A) nitrogen fixation
B) osmotic pressure
C) pH
D) hydrostatic pressure
E) quorum sensing
B
Bloom's Taxonomy: Comprehension
Section: Growth Requirements
Learning Outcome: 6.6
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In patients who do not have HIV, which underlying condition is considered a risk factor for acquiring PCP?
a. Malaria b. Cystic fibrosis c. Cytomegalovirus d. Myasthenia gravis
Compared to mammals that are not adapted for diving, diving mammals _______
A. have larger lungs B. always keep blood flowing to their lungs during a dive C. can store more oxygen in their muscles D. use gills for gas exchange
Productivity may be expressed in units of energy per unit area per unit time or in units of dry organic matter per unit area per unit time
Indicate whether the statement is true or false
Which of the following is not evidence for the endosymbiotic theory?
A) Chloroplasts and mitochondria contain ribosomes that resemble prokaryotic ribosomes. B) Chloroplasts and mitochondria contain their own DNA that resembles prokaryotic DNA. C) Chloroplasts and mitochondria have structures that resemble prokaryotic cell walls. D) Chloroplasts and mitochondria reproduce using binary fission, like prokaryotic cells.