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Which of the following best distinguishes natural selection from artificial selection?
Which of the following best distinguishes natural selection from artificial selection?
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Ɛhia
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Which of the following best distinguishes natural selection from artificial selection?
A population of birds lives in an area with seeds. Over time, the seed type changes to being harder and tougher. Eventually, most birds have larger, stronger beaks. This is an example of:
After a wildfire, only a small group of deer survives by chance. The surviving population has different allele frequencies than the original population. This scenario best illustrates:
Dolphins (mammals) and sharks (fish) have similar streamlined bodies and fins, despite not being closely related. This similarity is best explained by:
Whales and bats both have forelimbs with similar bone structures but used for different functions (swimming vs. flying). What kind of evidence does this provide for evolution?
Which of the following best explains why antibiotics are ineffective against viruses?
A population of dogs has been bred to be increasingly smaller over generations. This is most likely a result of:
Why might artificial selection lead to less genetic diversity than natural selection?
Which of the following scenarios would most likely lead to directional selection?
In a population of rabbits, white rabbits blend into snow, and black rabbits blend into dark rocks. Gray rabbits are more visible to predators. Over time, only white and black rabbits remain common. This is an example of:
A population of moths lives in a forest. Some are dark, some are light. After pollution darkens the trees, dark moths survive more often and reproduce more. The frequency of dark coloration increases. What is the mechanism of evolution?
A deer population shows an increase in a rare fur color due to a new genetic change passed to offspring. What mechanism is responsible for introducing this new trait?
Male peacocks with brighter feathers are more likely to attract mates and reproduce, even if they are more visible to predators. What evolutionary mechanism is most directly at work here?
A population of fish in one lake is joined by individuals from a nearby stream, increasing the genetic variation in the lake. What is the evolutionary mechanism?
Which of the following best describes the difference between the bottleneck effect and the founder effect?
Why do both the bottleneck and founder effects often result in reduced genetic variation?
Which of the following best illustrates divergent evolution?
Why do organisms that undergo convergent evolution often appear similar?
Fossils of a now-extinct land mammal are found on both the west coast of Africa and the east coast of South America. The best explanation for this pattern of distribution is:
Human embryos and fish embryos both show pharyngeal pouches (similar to gill slits) early in development. What does this suggest about their evolutionary relationship?
Scientists compare the amino acid sequence of hemoglobin in humans and other species. Which of the following would support evolutionary theory based on this biochemical evidence?
The wings of a bat and the wings of a butterfly are used for flying but have different structural origins. What kind of structures are they?
Humans have small muscles attached to their ears that once helped ancestral species move their ears to detect sounds. Today, most people cannot move their ears using these muscles. What term best describes these ear muscles in humans? (other examples are appendix and wisdom teeth)
How does viral replication differ from bacterial reproduction?
Which of these statements about bacteria and viruses is true?
