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Author Archives: Anonymous

In the video we watched in class, CRISPR-modified mosquitos…

In the video we watched in class, CRISPR-modified mosquitos were genetically engineered to reduce populations of wild mosquitos, which spread a variety of disease and viruses like Zika. What is this technique called?

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Valles Marineris is a(n)

Valles Marineris is a(n)

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Which of the following can act like a long-term “thermostat”…

Which of the following can act like a long-term “thermostat” that helps keep Earth’s average temperature fairly stable?

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The late heavy bombardment phase of the solar system happene…

The late heavy bombardment phase of the solar system happened

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Moving genes from one organism to another via genetic engine…

Moving genes from one organism to another via genetic engineering requires a [enzyme1] to cut DNA at specific palindromic sequences and [enzyme2] to join fragments of DNA back together.

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Which of the following is not an exception to the general pa…

Which of the following is not an exception to the general patterns found in the solar system?

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Energy Level Transitions. The diagram below shows five trans…

Energy Level Transitions. The diagram below shows five transitions (labeled with capital letters A through E) representing an electron moving between energy levels in a hydrogen atom. electron jumps.jpg  Which transition could represent an atom that absorbs a photon with 10.2 eV of energy?   

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Which of the following statements about electrons is not tru…

Which of the following statements about electrons is not true?

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The lithosphere of a planet is the layer that consists of

The lithosphere of a planet is the layer that consists of

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You have a sample rock bearing the unstable isotope potassiu…

You have a sample rock bearing the unstable isotope potassium-40 (40K) which decays into the stable isotope argon-40 (40Ar) over the course of a 1.3-billion year half life. In your sample you analyze the two isotopes and find that you have 8 g of 40K. The 40Ar analysis indicates that the sample originally started with 32 g of 40K. What is the age of this sample in years?

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