How do scientists use the term theory?
A) as a hypothesis that has not yet been tested
B) as a hypothesis that seems logical but cannot be tested because it's impractical to do so
C) as a set of findings that are supported by repeated testing
D) as ideas which are so obviously true that testing is not required
C
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In a species, what is required for a new sensory adaptation to evolve by natural selection?
A) Individuals that needed this trait mutated a sensory receptor to create the new adaptation. B) Individuals that possessed this trait produced more offspring than those that did not possess the trait. C) Individuals that possessed this trait survived by chance, and passed on the trait to their offspring. D) Individuals immigrated to a new area, and brought the trait with them.
Which genes are subject to cytoplasmic inheritance?
a. genes found in mitochondria and chloroplasts b. genes found in viruses c. genes found in bacteria d. genes found in sex chromosomes
Exoskeletons provided an evolutionary advantage to organisms by
A) increasing their ability to find a mate and reproduce. B) increasing their mobility and protecting them from predation. C) allowing exposure to oxygen. D) increasing predation. E) allowing increased opportunities for symbiotic relationships.
A significant contribution of intestinal bacteria to human nutrition is the benefit of bacterial _____
A) production of vitamins A and C B) absorption of organic materials C) production of vitamin K D) recovery of water from fecal matter