Describe the evidence for descent with modification (evolution) that Darwin presented in his book “The Origin of Species” in 1859. How well was the book received by scientists and the general public?
In: Biology
Describe how changes in the environment can alter expression?
In: Biology
We have discussed three methods of horizontal gene transfer. Correctly match the method with its name.
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In: Biology
How does crossing 2 true-breeding individuals show which version of the trait is dominant?
In: Biology
In: Biology
6. Can a genetic mutation sometimes cause someone to grow an
extra arm?
__ true
__ false
7. Mutations are the changes to the nucleotide sequence of the
genetic material of an organism?
__ true
__ false
8. Mutations can not be caused by copying errors in the genetic
material during cell division?
__ true
__ false
9. Which of these factor(s) are associated with DNA damage?
A. Alkylating agents
B. UV
C. All of these
D. Free Radicals
In: Biology
Which tissues and organs are involved in the immune response, and how does each function.
In: Biology
Discuss at least 3 of the causes that have led to all the sea turtles being listed as endangered species. Your discussion should include the reasons why sea turtles are in decline, as well as steps being taken to help sea turtles recover from the cause
In: Biology
In: Biology
The choices describe possible scenarios and outcomes from Gram staining with standard stains (e.g., crystal violet and safranin). Match the scenario with the most likely outcome and explain why this occurs.
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A. A gram-negative cell is stained, but the ethanol step is skipped. |
i. The cell will probably appear pink, which will not correctly indicate its cell wall structure. |
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B. A gram-positive cell with a severely damaged cell wall is stained. |
ii. The cell will appear pink. |
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C. A healthy gram-negative cell is stained. |
iii. The cell will appear purple/violet. |
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D. A healthy gram-positive cell is stained. |
iv. The cell will probably appear purple/violet, which will not correctly indicate its cell wall structure. |
In: Biology
Describe how a temperate/lysogenic phage can contribute to disease, and give one example
In: Biology
Catalase testing is one of several tests used to detect presence of an electron transport chain in a cell. Catalase is made by a cell to detoxify H2O2. How does presence of H2O2 relate to the presence of an electron transport chain?
In: Biology
Succinyl-CoA inhibits both citrate synthase and α-ketoglutarate dehydrogenase. How is succinyl-CoA able to inhibit both enzymes?
In: Biology
Listen to the interview with Richard Rothstein on the National Public Radio Fresh Air segment. Then answer the following questions regarding the content of the interview.
1. What are some ways that government policies instituted in the early to middle 20th century impacted the demographics of housing?
2. Discuss ways that these policies may play a role in susceptibility to disease to COVID-19 infection?
In: Biology
In: Biology