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You are a biologist working in Montana when you find a fossil wedged between two ancient layers of sedimentary layers. What technique would be the best tool to use to find the age of the fossil?Answer1. Use the radioisotopes sandwiched into the two layers around the fossil to approximate the range of time that the organism was alive.2. Use carbon dating of the fossil's carbon 12 isotopes.3. Use radioactive dating of the fossil's uranium-238 isotopes.4. Use the ratio of carbon-12 to carbon-14 isotopes in the fossil to approximate the time the fossil was formed.5. Use carbon dating of the fossil's carbon 14 isotopes.
Which of the following facts or phenomena likely represent the most alarming evidence warning of an ongoing sixth mass extinction event?Answer1. The thoroughly documented extinction of species in the rainforest.2. That we are currently in an ice-age.3. The likelihood of an asteroid striking the earth.4. The fact that polar bears and grizzly bears are now interbreeding.5. That previous extinctions rates increased with increased global temperature.
Hypothesize why some substances were not metabolized, while others were. Research the chemical formula of Equal and Splenda and explain how it would affect respiration.
What changes took place from one group to another. What advantages did each progressive group have over the last? Will you categorize each as more sucessful than the last.
In relation to the oxygen atom forming the linkage between glucose molecules, how are the hydrogens attached to the same carbon as the linkage oxygen oriented?
An organism of the genotype AaBbCc was testcrossed to triply recessive organism. The genotypes of the progeny are presented in the following table.
Define the general stress syndrome and compare homeostatic responses and stress responses.
Assume you infected an E. coli culture with a virulent bacteriophage. Most of the cells lysed, but a few survived - 1x10^-4. You wonder where the resistant bacteria came from.
There is a common misconception that traditional taxonomy is according morphology, while cladistics is based on genetic data. How is this misconception incorrect?
What is the difference between molecular motion and diffusion?is it extremely small to demonstrate brownian movement.
Robert, a smoker, is 52 years old. He has elevated blood pressure, in part, due to an elevated erythrocyte count. Knowing that smokers often have reduced plasma O2 levels, explain in detail (in a paragraph) why his erythrocyte count is elevated.
If a drug company developed a new drug which prevents something like osteoporosis, and has no side effects and has been used for 10+ years
in what direction does polymerization of RNA occur.
Assume you have identified a mutant E. coli strain that cannot synthesize histidine. To determine the location of the his- mutation on the E. coli chromosome.
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