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Q1. Suppose that you have been chosen as the biologist for the design team implementing a self-contained space station to be assembled in orbit. It will be stocked with organisms you select, creating an ecosystem that will support you and five other people for two years. Explain the main functions you expect the organisms to perform. List the types of organisms you would select, and explain why you chose them.
Q2. Biologists in United States are concerned that populations of many migratory songbirds, such as warblers, are declining. Evidence suggests that some of these birds might be victims of pesticides. Most of the pesticides implicated in songbird mortality have not been used in the United States since the 1970's. Propose a hypothesis to explain the current decline in Songbird numbers. Suggest an experiment that could test your hypothesis.
Calculate the physiological standard free energy change for the combined reactions in glycolysis converting 1,3-bisphosphoglycerate to pyruvate.
What is the explanation for the fact the most cells are small and have cell membranes with many convolutions.
You put a cuvette into a spectrophotometer and obtain an absorbance reading of 2.4. How much light is actually reaching the detector?
Name one pharmaceutical product for use by humans, produced by genetically engineered bacteria.
Write a prargraph to explain why the response of the third line of defence, both cellular and antibody immunity, is specific in nature
How much of a 25mg/ml chloramphenicol stock solution do we need to make 400 ml of growth media that has final 25ug/ml concentration of chloramphnicol?
q1. an investigator observes that when pure-breeding long wing drosophila are mated with pure-breeding short-wing flies
Describe how the hypothalamus regulates the secretion of anterior pituitary hormones and identify all of the individual hypothalamic regulatory factors. Describe how the hypothalamus controls the activity of the posterior pituitary gland.
Under physiological conditions, [glucose] = 5 mM, [g-6-P] = 80 μM, and Pi = 1 mM. Under these conditions, will the reaction go spontaneously from left to right? [Note: the concentration of water is always taken to be 1 M]
From Oregon to Southern California there is a putative hybrid zone between two closely-related species of pine - Pinus ponderosa and P. jeffreyi.
A calorie is the amount of heat required to raise the temp of one gram of water by 1°C (1 cal = 4 J). A marine iguana from the Galapagos Islands weighs about two kg.
Diagram and explain how xylem sap & phloem sap are transported in plants. There are several diagrams in the book showing different parts of the overall process.
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