Biology, 26.11.2019 06:31 xwalker6772
Refer to the paragraph on dark-eyed junco birds. the ucsd campus male junco population tails are about 36% white, whereas the tails of males from nearby mountain populations are about 4045% white. the founding stock of ucsd birds was likely from the nearby mountain populations because some of those birds overwinter on the ucsd campus each year. population sizes on the ucsd campus have been reasonably large, and there are significant habitat differences between the ucsd campus and the mountain coniferous forests; ucsd campus has a more open environment (making birds more visible) and a lower junco density (decreasing intraspecific competition) than that in the mountain forests. given this information, which of the following evolutionary mechanisms do you think is most likely responsible for the difference between the ucsd and mountain populations?
a. gene flow
b. genetic drift
c. natural selection
d. mutation
Answers: 2
Biology, 21.06.2019 23:30
Tara sees a commercial for a brand of pills that promise to boost energy and people perform better in work and school. as people in the commercial talk about how much better they feel when taking the pill, tara notices a message on the bottom of the screen that reads, "this pill is not approved by doctors and has not been tested in controlled experiments." what is the best conclusion that tara should make about the commercial? it is making scientific claims based on subjective observations. it is making scientific claims based on opinions instead of pseudoscientific facts. it is making pseudoscientific claims based on objective observations. it is making pseudoscientific claims based on opinions instead of scientific facts.
Answers: 1
Biology, 22.06.2019 18:00
The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .
Answers: 1
Refer to the paragraph on dark-eyed junco birds. the ucsd campus male junco population tails are abo...
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