During the drought of 1977, 84 percent of the medium ground finch population on daphne major disappeared. the individuals that survived had beaks that were deeper and larger than the beaks of individuals who did not survive.
given that natural selection favored large individuals with deeper and larger beaks, how can the presence of individuals with small, pointier beaks in 1983 be explained?
a) researchers were not measuring juvenile birds in 1977 but did measure juvenile birds in 1983. it is a well-known fact that juvenile birds are small and have small beaks.
b) these islands were colonized from the mainland. these small-beaked individuals must have flown over from ecuador.
c) even though the majority of birds after 1977 had deeper and larger beaks, there was still variation in beak size in the population. as seed type and seed availability changed, birds with beaks suited to exploit abundant seeds had higher reproductive success.
d) these islands must have received immigrants from a neighboring island.
Answers: 2
Biology, 22.06.2019 11:30, kristieroth1
Recently, crops of vegetables such as lettuce and green onions have been contaminated, while they are still on the farm, with bacteria that cause food poisoning. how will science influence the way the government responds to prevent an increase in food-borne diseases? because science has shown that lettuce and green onions are not nutritionally valuable, the government may pass laws that ban the sale of lettuce and green onions. because science has shown that there is no way to prevent bacterial contamination, the government may pass laws that punish businesses that buy lettuce and green onions. because science has shown that the washing of hands prevent the spread of infectious diseases among people, the government may pass laws that require hand washing by everyone who handles food. because science has shown there are ways to find the source of the contamination, the government may pass laws that require farm practices that reduce the contamination of lettuce and green onions.
Answers: 1
Biology, 22.06.2019 12:00, ALEXMASTERS64
Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?
Answers: 2
Biology, 22.06.2019 14:00, jimmyjimjim
What is one reason why transpiration is important in plants? question 19 options: it produces food from the sugar in the plant cells. it enables the flow of water out of the plant. it produces carbon dioxide in the leaves of the plant.
Answers: 1
During the drought of 1977, 84 percent of the medium ground finch population on daphne major disappe...
History, 20.11.2019 20:31
Mathematics, 20.11.2019 20:31
Geography, 20.11.2019 20:31
Mathematics, 20.11.2019 20:31
English, 20.11.2019 20:31
Biology, 20.11.2019 20:31
History, 20.11.2019 20:31