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"Keystone Species, Shrinking Red Knots, and Biomes"
Our focus this week is on ecology. Ecology is the study of interactions among organisms and between organisms and their physical environments. For your primary post, respond toone of the following three topics. Also, reply to at least one fellow student on any topic.
Topic 1 [video]: Keystone Species. Watch the video entitled "Some animals are more equal than others..." (1)* Then completely describe the concept of a keystone species, giving specific examples from the video.
How do the xylem and phloem function, what are they, and how do they differ from each other?
Which term describes tonicity of the external solution. Were latitude the only control of temperature, the isotherms would run straight across the map from east to west. Describe one region of the world where this hypothetical isotherm pattern is rea..
Are there some bacteria that are not easily stained by the gram stain? Can you give an example of a bacterium that might not show up as gram-positive or gram-negative after being stained by Gram's method?
q1. in the small stream you choose a rock and observe many small flattened worms crawling on it are under surface. you
Briefly describe this repair mechanism and explain how the mechanism knows which strand to repair.
You are investigating a potential crime scene that has no body, but only one small bone fragment left with what appears to be some very degraded tissue attached. B
Disulfide Bonds Determine the Properties of Many Proteins Some natural proteins are rich in disulfide bonds, and their mechanical properties are correlated with the degree of disulfide bonding.
Ann needs a blood transfusion. Ann has blood type A-. Three of Ann's friends have offered to donate blood for her transfusion.
Why does the thoracic cavity expand in volume?
To strengthen your understanding of structure and electrical activity (movement of ions) of the neuron, please create a FUNCTIONING model of the neuron.
When mammals eat food that contains protein, the protein is broken down to amino acids and the amino acids travel from the lumen of the small intestine to a blood vessel.
The pKa of that basic functional group on the enzyme is 8.0, and is the only pKa apparent on a plot of kcat vs. pH for the activity of this enzyme. The kcat of the fully active form of the enzyme is 1 x 105 sec-1 .
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