Biology, 17.03.2022 14:00 nickolasbradyp0hvwl
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A virus has entered the blood vessels of the nose. Where would the virus first encounter the defenses of the lymphatic system? (2 points)
In the tonsils, which are located at the back of the throat
In the tonsils, which are located in the chest
In the thymus, which is located at the back of the throat
In the thymus, which is located in the chest
Answers: 3
Biology, 22.06.2019 00:00
How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000
Answers: 1
Biology, 22.06.2019 09:30
Natural resources are any materials that humans obtain from the earth to meet our wants and needs.
Answers: 3
Biology, 22.06.2019 14:50
Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.
Answers: 1
Biology, 22.06.2019 15:00
Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.
Answers: 1
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A virus has entered the blood vessels of the nose. Where would the virus firs...
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