The ability to respond to a stimulus is an example of
order of complexity
sensitivity
evolution
homeostasis
The Correct Answer is B
A. Order of complexity: Order of complexity refers to the organized structure of living systems, from molecules to cells to organisms. While organization is important, it does not directly describe the ability to respond to a stimulus.
B. Sensitivity: Sensitivity is the capacity of an organism to detect and respond to changes or stimuli in its environment. This characteristic allows living beings to adapt behaviorally or physiologically, ensuring survival and interaction with their surroundings.
C. Evolution: Evolution involves gradual genetic changes in populations over generations. It explains long-term adaptation but does not account for an immediate response to a stimulus by an individual organism.
D. Homeostasis: Homeostasis is the maintenance of internal stability, such as temperature or pH, despite external changes. While it can involve responses, it specifically refers to regulation rather than reacting to a particular stimulus.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. yeasts and molds: These are classified as fungi, not protists. They reproduce by spores and have distinct cellular structures different from protists.
B. algae and protozoa: Protists are a diverse group of mostly unicellular eukaryotes, and this category includes algae, which perform photosynthesis, and protozoa, which are animal-like and often motile.
C. helminths: Helminths are multicellular parasitic worms such as tapeworms and roundworms. They are not protists because they are much more complex organisms.
D. bacteria: Bacteria are prokaryotic microorganisms lacking a nucleus, while protists are eukaryotic and contain membrane-bound organelles.
E. viruses: Viruses are acellular entities that require a host to replicate, and they are not considered part of the protist kingdom.
Correct Answer is B
Explanation
A. the nucleic acid of a viral pathogen: Viral nucleic acid is a component of a virus, but by itself it does not constitute a virion. A complete virion must include both nucleic acid and a protective protein coat.
B. a mature infectious particle of protein and nucleic acid: A virion is the fully assembled, extracellular, and infectious form of a virus. It consists of viral nucleic acid (DNA or RNA) encased in a protein capsid, and in some cases, an envelope derived from the host cell.
C. a population of infectious particles: This describes multiple virions, but the term virion specifically refers to a single, complete viral particle.
D. the protein portion of a viral particle: The protein portion alone is called the capsid, not a virion. The capsid is necessary for protection and attachment but does not represent the full infectious particle.
E. the nucleic acid of a viral pathogen inside a host cell: Once inside the host cell, the virus exists as genetic material engaging in replication, but this is not considered a virion since it is no longer in its extracellular, infectious state.
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