An organ represents a higher level of structure than the tissues composing it, and it performs functions that the tissues cannot perform alone. This is an example of the principle of
A) structural adaptations.
B) cellular regulation.
C) emergent properties.
D) biotechnology.
Answer: C
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Which of the following is TRUE about the crenarchael genera Sulfolobus?
A) Sulfolobus grows in sulfur-rich hot alkaline springs. B) Sulfolobus is an anaerobic chemolithotroph. C) Sulfolobus can grow chemoorganotrophically. D) Sulfolobus is a gram-positive rod.
The zona pellucida is used for what?
a. protection of a mammal egg before fertilization b. nutrition for a mammal egg before fertilization c. recognition for a sperm cell d. provides immunity for a mammal egg before fertilization
Which of these is an example of sister chromatids?
a. Replicated chromosomes held together at the centromere b. Maternal chromosome 1 and paternal chromosome 3 c. X and Y chromosomes d. Maternal chromosome 1 and paternal chromosome 1
Testing for _______includes culture and sensitivity of infected body tissues or nasal secretions.
a. rickettsial infections b. tuberculosis c. MRSA d. bacterial infections