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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?
The habitat of one species of tropical fish is red coral reefs. The large majority of the fish in this population are red. A few individual fish carry a mutation that prevents the production of the red pigment.
A male volunteer named Conan was passively sensitized with IgE specific for Der f 1. After an intradermal challenge with Der f 1, Conan show a typical skin lesion due to an immediate hypersensitivity reaction.
Assume you have labeled a glucose molecule with a fluorescent marker so you can follow its path by the kidney. you observe your glucose molecule in renal artery and in the glomerular capsule.
After some week's plants that were transplanted into nonsterile soil exhibited a much higher growth rate compared to the plants transplanted into sterile soil. What would be the most likely explanation for this result.
In human gut microbiome, it is proposed that the most inner layer of bacterial cells (most close to the epithelial cells) is composed of micro-aerobes.
What effects are produced by an enzyme on the general reaction below? The rate constant for the forward reaction (K1) increases
Red-green color blindness in humans is inherited as an X-linked recessive condition. Consider reciprocal crosses between a color-blind parent.
describe one diference between the action potentials produced by cardiac contractile cells and the action potentials produced by skeletal muscle fibers. PLEASE BE SPECIFIC.
Assume if you were working with an organism like Arabidopsis, Drosophila, or any diploid organism that requires to use sexual reproduction to produce offspring.
Determine the genotypes of parental, recombinant and if applicable double and triple recombinant progeny from the testcrosses of following individuals.
What is the best explanation for why tracheary elements are absent in the center of many monocot roots, but present in other seed plant roots?
Justify the hypothesis of early microorganisms were chemolithotroph and why phototrophic organisms that came after had pigments that absorbed maximally at UV and IR radiation
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