WAY TO PASS | REAL TESTS, REAL RESULTS!
Roughly how old are the oldest fossils on Earth? - Answer: 3.8 billion years
According to scientific evidence, approximately when did Earth form? - Answer: 4.6 billion
years ago
How long did dinosaurs roam on Earth? - Answer: about 180 million years
According to the fossil record, which was first on earth, dragonflies or dinosaurs? - Answer:
dragonflies
Which statement about dragonflies is true? - Answer: a. During their lifecycle, dragonflies
spend several years in water
B. Adult dragonflies can only feed while they are flying, because they need all their legs to
hold their prey. They starve if they cannot fly
C. Dragonflies have no changed much in appearance for hundreds of millions of years
D. During their larval stages, dragonflies often eat fish and tadpoles.
E. All of the above
E. All of the above
About 100 million years ago, the max wingspan of dragonflies decreased while the oxygen
level in the atmosphere stayed constant. Clapham and Karr attribute this drop in dragonfly
size to - Answer: the evolution of modern bird traits, which improved their flight
performance
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, According to the paper by Clapham and Karr, which evidence supports the conclusion that
oxygen levels in the atmosphere limit the max size of dragonflies? - Answer: During the
Carboniferous, dragonfly size increased with rising oxygen levels and decreased when
oxygen levels went down
According to members of medical school selection committees, what is the most
important characteristic of incoming med-school students? - Answer: they take an active
role in shaping their own learning experience
According to scientific evidence, which of the following statements best describes the
history of life on Earth? - Answer: although life began relatively soon after the Earth cooled,
most major evolutionary changes occurred in the most recent quintile of Earth's history
According to your reading assignment, how does facilitated differ from simple diffusion? -
Answer: in facilitated transport, the substance passes through a pore, or tunnel, inside
other molecules in the membrane
A drop of blue dye is released into the left side of a tank of water. The molecule of blue dye
gradually disperse among the molecules of water in the tank. If you could identify one
molecule of dye and observe how it moves, which of the following statements would best
describe its behavior after it is introduced into the water? - Answer: it is equally likely to
move to the left vs right
When considering all of the molecules of blue dye in the tank, why do they end up relatively
evenly distributed throughout the water? - Answer: as a matter of probability, more dye
molecules will move to an area with fewer of them, than vice versa
Suppose you are developing a new dye that will enter cells through diffusion across the
plasma membrane, enabling you to see the cells more easily under a microscope. If you
want to increase the rate of diffusion fo the dude molecules into the cells, you might try all
of the following EXCEPT: - Answer: increase the mass of the dye molecules
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