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List two or three features of an earthworm cross section that distinguish the dorsal and ventral surface.
Now that you have examined the unifying characteristics of annelids, list 3 or 4 characteristics they share with flatworms and nematodes as the close ancestors.
Are any sensory organs evident in Ascaris? Why would this be adaptive?
How may stomata density serve as a bioindicator for monitoring the response of plants to changes in greenhouse gas concentrations in the future.
In reference to the tripeptide Gly-Ala-Val,what is the isoelectric point at a pH of 1 and in what direction would it move if placed in an electric field.
What advantages would there be for an organism to be able to turn on or off particular genes in response to certain conditions?
As the aroma of freshly brewed coffee drifted by a sleeping student's nose, his mouth began to water and his stomach began to rumble. Explain his reactions in terms of ANS activity.
A plant is growing in the middle of a patch of bare dirt; there are no other plants within twenty meters except for one other plant one meter away.
Explain which strategy you think would lead to more rapid genetically-based gains in the rate at which chickens grow? (assume the starting populations for both strategies have the same genetic composition).
When an experiment is repeated with a protein medium, yeasts grow only in the presence of oxygen. Pasteur concluded that the yeasts can take oxygen from air, and in the absence of air, the yeasts take oxygen from sugar.
find if your unknown organism ferments mannitol. What are the two tests?
When evolution occurs we would expect different regions with similar enviornments to all contain the same mix of plants and animals.
How would you expect the allocation of energy among plant organs to change as the amount of terrestrial ecosystem NPP increased? Explain why you would expect the allocation pattern you describe.
In a testcross of Aa Bb CC Dd Ee FF where the genes demonstrate independant assortment and determine the expected frequency of aa bb Cc dd ee Ff progeny?
Hydrogen peroxide (h2o2) breaks down into water and oxygen. Explain why this is a chemical reaction. What are reactants and products in the reaction.
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