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The respiratory system includes a layer of cells in the air passages that clean the air before it gets to the lungs. This layer of cells is best classified as
are composed of organ systems
regulate oxygen and carbon dioxide levels
movement of water through leaf openings controlled by the guard cells
resistant bacteria survive in greater numbers and pass the trait to their offspring
a tissue
carbon dioxide and water combine to produce glucose and oxygen
survival and reproduction of unaffected bacteria
maintain homeostasis
Which process is most closely associated with the regulation of water loss from the leaves of trees?
are composed of organ systems
regulate oxygen and carbon dioxide levels
movement of water through leaf openings controlled by the guard cells
resistant bacteria survive in greater numbers and pass the trait to their offspring
a tissue
carbon dioxide and water combine to produce glucose and oxygen
survival and reproduction of unaffected bacteria
maintain homeostasis
A similarity between humans and many other multicellular animals is that they
are composed of organ systems
regulate oxygen and carbon dioxide levels
movement of water through leaf openings controlled by the guard cells
resistant bacteria survive in greater numbers and pass the trait to their offspring
a tissue
carbon dioxide and water combine to produce glucose and oxygen
survival and reproduction of unaffected bacteria
maintain homeostasis
Medical professionals are concerned with the increase in the number of bacterial species that are resistant to antibiotics. Once resistance appears in a bacterial population, it spreads rapidly. This is most likely because
are composed of organ systems
regulate oxygen and carbon dioxide levels
movement of water through leaf openings controlled by the guard cells
resistant bacteria survive in greater numbers and pass the trait to their offspring
a tissue
carbon dioxide and water combine to produce glucose and oxygen
survival and reproduction of unaffected bacteria
maintain homeostasis
Which statement best describes how these substances interact in photosynthesis?
are composed of organ systems
regulate oxygen and carbon dioxide levels
movement of water through leaf openings controlled by the guard cells
resistant bacteria survive in greater numbers and pass the trait to their offspring
a tissue
carbon dioxide and water combine to produce glucose and oxygen
survival and reproduction of unaffected bacteria
maintain homeostasis
If the same antibiotic is used too many times, it can become less effective against a certain type of bacteria. This observation is best explained by the
are composed of organ systems
regulate oxygen and carbon dioxide levels
movement of water through leaf openings controlled by the guard cells
resistant bacteria survive in greater numbers and pass the trait to their offspring
a tissue
carbon dioxide and water combine to produce glucose and oxygen
survival and reproduction of unaffected bacteria
maintain homeostasis
A small lizard spends the morning hours lying in the sunlight until its body temperature rises. Later on in the day, the lizard rests in a shady area until its body temperature cools. This type of behavior is important to
are composed of organ systems
regulate oxygen and carbon dioxide levels
movement of water through leaf openings controlled by the guard cells
resistant bacteria survive in greater numbers and pass the trait to their offspring
a tissue
carbon dioxide and water combine to produce glucose and oxygen
survival and reproduction of unaffected bacteria
maintain homeostasis
In the leaf of a plant, guard cells help to
are composed of organ systems
regulate oxygen and carbon dioxide levels
movement of water through leaf openings controlled by the guard cells
resistant bacteria survive in greater numbers and pass the trait to their offspring
a tissue
carbon dioxide and water combine to produce glucose and oxygen
survival and reproduction of unaffected bacteria
maintain homeostasis
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