Development refers to
the process of producing more cells
the process of producing larger cells
the process of responding to environmental changes
the process of changing from an original form to a final form
The Correct Answer is D
A. The process of producing more cells: Producing more cells describes cell division or growth, which increases the number of cells but does not encompass the overall progression toward a mature form.
B. The process of producing larger cells: Increasing cell size is a part of growth at the cellular level but does not capture the broader concept of development involving structural and functional changes over time.
C. The process of responding to environmental changes: Responding to environmental changes refers to sensitivity or adaptation, which helps an organism survive but is separate from the developmental process.
D. The process of changing from an original form to a final form: Development involves the transformation of an organism from its initial state to a mature form, including differentiation, growth, and functional specialization, reflecting the progression from origin to maturity.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. viral infections: Cytopathic effects (CPEs) are structural and functional changes in host cells resulting from viral infections. Examples include cell rounding, syncytia formation, inclusion bodies, and cell lysis, all due to viral replication and interference with normal cellular processes.
B. protozoal infections: Protozoa can damage host tissues through invasion and toxin production, but they do not typically cause cytopathic effects as defined in virology.
C. fungal infections: Fungi may cause tissue destruction through enzymes and inflammation, yet they do not lead to the characteristic cytopathic effects seen with viral infections.
D. bacterial infections: Bacteria can produce toxins and cause tissue damage, but cytopathic effects specifically refer to viral-induced cellular alterations, not bacterial activity.
Correct Answer is C
Explanation
A. activity of a bacteriophage: This describes the cause of the clear zone, since bacteriophages infect and lyse bacterial cells, but it is not the correct term used for the zone itself.
B. colony: A colony is a visible cluster of bacterial cells originating from a single progenitor cell, not a clear zone caused by viral lysis.
C. plaque: A plaque is the clear area formed on a bacterial lawn where bacteriophages have infected and destroyed bacterial cells. It represents viral activity and spread.
D. lawn: A lawn refers to the uniform layer of bacterial growth on the agar surface, which serves as the background where plaques can be observed.
E. culture: A culture is the overall growth of microorganisms in a medium, not the specific clear zone produced by bacteriophage activity.
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