What caused the coloration differences of the guppies?
As turbidity decreases in the pools Endler collected guppies from, the number of predators decrease and the number of bright colored guppies increases. Therefore, the trends in the coloration of guppies is caused by the turbidity of the water.
What do you predict would happen to mostly drab guppies that were placed in a stream with very few predators What would happen to brightly colored guppies that were placed in a stream with many predators What factor would have to present in the populations of these groups of fish?
What would happen to mostly drab guppies that were placed in a stream with very few predators? They wouldn’t reproduce as much because due to the lack of predators there would be more mating among the brighter guppies because there is a less risk of being eaten.
Can predation result in natural selection for color patterns in guppies?
Predation results in selection for more drab color patterns in guppies. Researchers further hypothesized that if predation pressure is reduced, drab coloration would become less beneficial (since females prefer brightly colored mates).
Why are guppies good model organisms?
The guppy, Poecilia reticulata, is one of the most famous tropical ornamental fish in the world. The guppy has frequently been used as model organism for experiments in fish genetics because of its short life cycle, ease of breeding and reproductive capacity.
Which of the following statements about natural selection is most accurate?
The correct statement is – Natural Selection is the process by which ‘organisms with more beneficial traits’ are likely to survive and reproduce. EXPLANATION: Natural selection is the process of ‘differential survival’ and ‘reproduction in organisms’ that have different phenotype.
What are two true statements about natural selection?
A: Natural selection cause advantageous variation to become more common over many generations. B: Only variation that help individuals avoid predators can become more common through natural selection. C: Natural selection can cause an individual to gain new advantageous variation during its life.
Which of the following is the best example of natural selection?
Natural selection is the process in nature by which organisms better adapted to their environment tend to survive and reproduce more than those less adapted to their environment. For example, treefrogs are sometimes eaten by snakes and birds.
Which of the following is an example of artificial selection?
Dog breeding is another prime example of artificial selection. Although all dogs are descendants of the wolf, the use of artificial selection has allowed humans to drastically alter the appearance of dogs.
What situation is an example of artificial selection quizlet?
Artificial selection is when someone breeds one type of animal, e.g. dog, with another kind of that animal to create a new breed of that animal that contains the characteristics of the two previous breeds of that animal.
What is artificial selection and give an example?
Artificial selection is when a human determines two organisms to mate and tries to predict the results with regard to one trait. For instance, let’s say you want a fast race horse. You go out and choose a male and female horse that are both very fast and have won races.
How are artificial and natural selection different quizlet?
Natural Selection acts without the input of humans; Artificial Selection requires human input. Artificial Selection still has Variety, Inheritance and Differential Reproductive Success, however, farmers chose mates, so its reproduction is not considered natural. What is Directional Selection?