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You fill a cuvette with a solution of enzyme, substrate, and dye that changes color as the reaction occurs. You put it in a spectrophotometer and record the absorbance at several time points. The absorbance increases at first, then starts to level off, staying almost exactly the same at each time point. Why did the absorbance increase at the beginning AND why did it level off over time?
Which of the following best explains the phrase "descent by modification"?
Why would some biologists refer to single-celled organisms such as Amoeba and Paramecium as "acellular" rather than "unicellular"?
How many calories are from fat per serving? Calculate the percentage of the total calories per serving that come from total fat? How many grams of total fat would a person consume if he/she ate the whole container?
assume that a particular genetic condition in a mammalian species causes an inability to digest starch. this disorder
Some strains of wheat can planted in the fall and survive the winter(winter phenotype), but others must be planted in the spring (spring phenotype). crosses between pure breeding winter and spring strains gave an F1 that was all spring type, and a..
A 58-year-ld man with chronic alcoholism presents with abdominal pain, fever, and hematemesis. Laboratory studies showed elevated serum levels of liver enzymes (AST, ALT) and decreased serum albumin (2.2 g/dL) the patient dies of bleeding esophage..
Determine the major difference between the cytoskeleton of bacteria and eukaryotic cells and if you were to analyze a DNA sample from a eukaryotic cell.
What are the advantages of having both an immune and an inflammatory system of defense
Describe how and why atmospheric carbon dioxide levels fluctuate daily, seasonally, and geographically. Also why is the carbon cycle tied to energy flow charts?
Why do you think a large part of the primary somatic sensory area of the cerebral cortex is devoted to the face and hands?
The following amino acid sequence was derived from the DNA sequence of a gene encoding a hypothetical type I integral plasma membrane protein. (The • merely indicate every 10 amino acids beginning with M1 & ending with V140). Use this informat..
Explain why the removal of great sharks poses a threat to bay scallops on the Atlantic Coast of North America, despite the fact that large sharks do not feed on scallops. Include the concept of a trophic cascade in your discussion.
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