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1. what is the adaptive advantage of having the system to propel sporangia as seen in pilobolus?
2.how many bacterial cells are necessary to start a colony?
3.how many bacteria will be produced from single bacterium in a day?
4. in blue green algae (gloeocapsa), what hols the colony together?
5.in what ways do blue green algae resemble bacteria? what are significant differences?
6. what criterion can you use to decide if an organism form true colonies?
7. does the fact that sexual recombiantion has not been found in the cyanophyta mean that these organism lack sex?
Unlike steroid hormones, signaling molecules that are large and/or hydrophilic cannot pass through the cell's plasma membrane and therefore must bind extracellularly to receptor molecules in the plasma membrane.
Compare and difference wave summation with recruitme nt. How are they similar? Describe how wave summation and recruitment are achieved in the body.
When viewed under a microscope, healthy red blood cells appear flattened, circular and biconcave. They appear pink on the outside but have a whitish center. Why does their center appear white?
Explain why does a single capillary have a high resistance to the flow of blood and a capillary network of circulation have a low resistance?
What effect does cell size have on a cell's ability to efficiently carry out it's activities? Give an exam.
He says that the mere presence of DNA is not sufficient to prove the point: his cells may have adopted DNA as a useful molecule quite independently of all other known life forms. What would you do to convince him that he was wrong.
The new antibiotic cubicin works by creating a passive transport channel for H+. Obviously this would affect the PMF, but other cell processes may be disrupted as well. How would treatment with cubicin affect flagellar motility and chemotaxis.
Suppose that a husband and wife are both heterozygous for a recessive allele for albinism. If they have dizygotic (two-egg) twins, whats the probability that both the twins will have the same phenotype for pigmentation?
Scientists believe that if there are no controls on the emission of CO2 from burning of fossil fuels, that concentration of this gas could double by the end of the current century, leading to a significant rise in the average temperture of earth. ..
Assume if the DNA in one of your skin cells were to change, which cells that are you would inherit that change?
Frogs are extremely sensitive to acid rain. How might this information be used to investigate your observation about the trees dying in the forest.
Present 2 factors contributing to the solid waste problem in the US. How could these factors be changed or controlled for the better. What problems are there with current recycling efforts.
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