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Giuliana Thornton
A group of mice becomes separated by the formation of a river. Over time, the northern mice became smaller and whiter, while the southern mice became larger and browner. This is an example of: a. acquired characteristics b. speciation by isolation c. gigantification d. homologous structures
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Saniya Blair
Cardiac output may decrease if the heart beats too rapidly because:
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Alexzander
Where does a bird's song come from?
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Deven Sparks
Determine which matrices are in reduced echelon form and which others are only in echelon form
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Ronnie Mendez
What is the Golgi in the animal cell
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Axel Salazar
Which of the following is a chain smoker likely to develop? select one of the options below as your answer:

a. hepatitis

b. lung cancer

c. blood cancerb. lung cancer is a desease a chain smoker most likely to develop?
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Nina
What are some examples of physiological adaptations
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Gianna Lewis
What are sudden large declines in biodiversity in the fossil record called? A. mass evolution B. mass decline C. mass increase D. mass extinction
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Jaylen Gould
How do mutations lead to genetic variation? A. by producing random changes in an organism's genetic code B. by changing the organism's behavior C. by changing the organism's appearance D. by changing the way that the organism reproduces
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Randolph
The polymerase chain reaction (PCR) has revolutionized biology and medicine, by allowing small regions of DNA to be amplified up to a billion-fold over 30 cycles in a few hours. Each cycle involves heating the DNA to 95°C to separate the two strands, the sample is then cooled to allow primers to bind, and finally the temperature is raised to the optimal temperature for the DNA polymerase to replicate the DNA. This process makes use of the DNA polymerase from a species of bacteria isolated from hot springs, Thermus aquaticus, which grows at 70°C. Human body temperature is 37°C. What would you predict about the DNA polymerase from T. aquaticus compared with DNA polymerases from human cells?
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Ximena Roman
What adaptation keeps hippos from getting sunburned?
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Quentin Pruitt
Explain the difference between a "hawk" and a "dove."
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Ryan Sparks
The human genome contains about 3 billion base pairs. During the first cell division after fertilization of a human embryo, S phase is approximately three hours long. Assuming an average DNA polymerase rate of 50 nucleotides/second over the entire S phase, what is the minimum number of origins of replication you would expect to find in the human genome?
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Dakota Combs
What does the D in DNA stand for?

a. the name of the base that makes it up

b. the number of strands that form it

c. the kind of macromolecule it is

d. the name of the sugar that makes it up
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Xzavier Cherry
Which of the following was not a geological clue used to support the theory of continental drift?

A. Rocks of the same composition and age were found in Brazil and South Africa.

B. Fossils of the reptile Lystrosaurus were found on the landmasses of Africa, India, and Antarctica.

C. Fossils of the plant Glossopteris were found on the landmasses of South America, Africa, India, Antarctica, and Australia.

D. Samples of ocean water tested off the coast of South America contained the same salt content as oceans near Africa. NextReset
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