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Among bryophytes, only the sporophytes of mosses and hornworts have stomata, whereas stomata are missing from liverwort sporophytes. If the common ancestor of all bryophytes had sporophytes that bore stomata, then which of these might account for their absence from liverwort sporophytes? If, in contrast to early mosses and hornworts, early liverwort sporophytes had A) decreased need to broadcast spores long distances. B) increased robustness (i.e., thicker, more massive tissues). C) increased nutritional independence from the gametophyte. D) more-effective transport of glucose from gametophyte to sporophyte.
What information does it not provide that may be useful for deciding on conservation efforts. What are the genotypes of the parents.
Describe the hierarchical 3D arrangement of DNA in a chromosome. How many molecules of DNA are there in a chromosome.
A multipass transmembrane protein is demonstrate schematically below. The boxes represent membrane-spanning segments and the arrow represents a site for cleavage of the signal sequence.
What are synonymous and nonsynonymous substitutions? What are the evolutionary implications of a high nonsynonymous/synonymous substitution ratio?
Identify the elements and the number of atoms of each element in each of the following compounds.
Assume you review a young patient in the emergency room who is complaining of ankle pain following a soccer game. The patient shows to you that an accident resulted in his foot being forced into an excessively inverted position.
Assume i f you are performing in-situ hybridization to detect mRNA, why do you use the antisense strand? Are you using RNA or DNA as a probe for mRNA?
Why is methanol used in the process of destining proteins in a SDS-PAGE gel?
A structural protein may incorporate large amounts of immobilized water as part of its structure. How do protein molecules "freeze" the water in place and make it part of their protein structure?
We are supposed to draw a lineweaver burke plot to calculate the Km and Vmax, which I am able to do, except the units for the substrate are supposed to be micromolar.
Know how liquid (broth) and solid forms of media (slants, deeps, petri dishes) are prepared and sterilized in an autoclave.
Explain bioremediation in detail. Write an essay on the bioremediation.
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