The specimens of choice for detecting nontuberculous mycobacterial disease are:
a. spontaneously produced sputa.
b. gastric lavages.
c. transtracheal aspirations.
d. bronchial lavages, washings, and brush-ings.
D
Bronchial lavages, washings, and brushings are the specimens of choice for detecting nontuber-culous mycobacteria and other opportunistic pathogens in patients with immune dysfunctions. They are collected and submitted by medical personnel.
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What is a potential consequence of non-disjunction in meiosis?
a. extra chromosomes b. the correct number of chromosomes c. non-disjunction only during mitosis d. non-disjunction only during DNA replication
Imbibition is the process by which a seed takes in oxygen from the environment
____________________ Indicate whether the statement is true or false.
How does ocean fishing affect marine ecosystems today?
A. Because the oceans are so large, they are the one remaining natural ecosystem that is not susceptible to extinction. B. Ocean fishing has resulted in overexploitation in 11 of the 15 major oceanic fishing areas. C. Only 2 of the 15 major oceanic fishing areas are considered overexploited. D. There has been an increase of bottom-dwelling ocean fish, but schools of swimming fish have declined. E. Bottom-dwelling fish are frequently overfished by trawling, but schools of swimming fish that can easily get away are increasing.
The (fungi/algae/lichens) are so sensitive to pollutants that they are used as indicators of environmental conditions
What will be an ideal response?