and Answers 100% Pass
Look at the formula below, which was in your lecture on diffusion. What important
point is illustrated by this formula?
t=x^2/2D - ✔✔Small increases in the distance over which particles travel by diffusion
require large increases in the time for that diffusion to take place.
A drop of dye has been deposited at one end of a tank of water. If you leave the tank of
water alone for a long period of time (several days) and return to it later, which
statement best describes the behavior of the dye molecules at the time you return? -
✔✔They're still moving in the same manner as when they were dropped into the tank.
According to scientific evidence, approximately when did Life first appear on Earth? [
Select ] ["3.7 million years ago", "64 million years ago", "3.8 billion years ago", "2.1 billion
years ago", "4.6 billion years ago"] - ✔✔3.8 billion years ago
2.5 billion years ago
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,Which of the following statements best describes the distribution of major events in the
history of life on Earth? - ✔✔Major evolutionary milestones tend to be more highly
concentrated at the recent end of the timeline that extends from the origin of life until
today.
The atmosphere of the early Earth did not contain O2. Where did the O2 eventually
come from? - ✔✔Photosynthetic organisms released the O2.
What is the logic behind Drs. Bush and Schul's system for assigning the teams? -
✔✔Maximize diversity of experience, background, majors, etc., because this increases
the likelihood of the group members to be successful
In the figure below from your video on diffusion, a red arrow points to an orange
particle. In the next instant of time, which direction is the orange particle most likely to
move? - ✔✔All the directions are equally likely.
The atmosphere of the early earth lacked molecular oxygen. If O2 had never been
added to the atmosphere, what geological phenomenon would not have occurred? -
✔✔Most minerals wouldn't exist
You are standing in line for lunch in the Student center. You try to explain to one of
your classmates how much distance they should leave between you using what you
learned about the size of Meganeura (the giant dragonflies). How many Meganeuras
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, should be able to fly side by side between two people in line to maintain sufficient
social distancing during the Covid-19 pandemic? - ✔✔2 meganeuras
Danielle, a student in Bio1500, worked very hard on the lab and has a Lab average of
100%. Because she skipped several discussions without excuses, her average in the
discussion is 75%. What is the combined Lab*Discussion score which counts for 25% of
the total Bio1500 grade? - ✔✔75%, because the two grades are multiplied with each
other
Which of the following statements about dragonflies is false? - ✔✔Dragonflies feed on
nectar and pollen and are important plant pollinators
When do mutations occur? - ✔✔at random times
In the fall, maple leaves turn bright red because they use pigments called carotenoids
instead of chlorophyll for photosynthesis at this time of year. Given this information,
which of the following statements is most likely true of maple leaves in the fall? -
✔✔They absorb blue and green light energy.
Of the following questions about Covid-19, [ Select ] would be categorized at Bloom's
level evaluate, and [ Select ] would be at Bloom's level analyze. - ✔✔Who should be
given higher priority to receive the vaccine: people most at risk of serious illness, or
people most likely to spread the virus to others?
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