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Briefly describe a piece of evidence supporting the theory that genome evolution involves the rearrangement of existing genes.
In a Northeastern U.S. forest, tiger salamanders were abundant. These salamanders need the humidity of the forest to survive and have a short dispersal distance when they leave the forest (less than
You go through four evolutionary mechanisms and discuss whether each is likely or unlikely to account for the change in allele frequencies: mutation, gene flow (migration), genetic drift, and natura
Ground finches feed on seeds from different sizes, in different islands from the Galapagos Archipelago. The populations have beaks of different sizes. Finches with small beaks eat small seeds, finch
Hypothetical deer population: Females prefer bigger males to mate. Thus, big males have more offspring than intermediate males. Intermediate-sized males have more offspring than small males. Small
Historically, soapberry bugs fed on seeds from fruits of native fruits in Florida. Their beak is long enough to pass through the pulp and reach the seed. Native trees (and their fruits) in Florida b
Red flowered male plants were crossed to white flowered female plants. The progeny from this cross were examined and it was found that there were only white-flowered male plants and red-flowered fem
DNA sequences can also be used for phylogenetic analysis, but this approach relies on the growth and cultivation of microorganisms in the lab and knowledge of specific gene products and sequences.
A mutagenesis screen was conducted to identify plants that were unable to sustain green leaves under high intensity lighting. In the M2 generation three mutants were identified.
In constructing the molecular phylogeny, researchers extracted DNA from Vibrio cholerae and then compared housekeeping gene sequence homology in order to characterize the sample strains.
Prokaryotic and eukaryotic cells are distinguishable by many features, including their genomes. You have been provided with samples of total DNA from prokaryotic and eukaryotic cells.
How can horizontal gene transfer be exploited in molecular biology?Please give full description about gene.
What is the product of the psbC gene? What is its function? In the PCR reaction, what is the role of each of the PCR reagents: primers, dNTPs, Mg2+, and Taq polymerase?
Distinguish among covalent bonds, ionic bonds, hydrogen bonds and hydrophobic interactions.
Scientists are taught to follow the scientific method. In doing so, they should be assured that there is no bias in their science. However, is this always the case?
My impression is that in forests the process of breaking down wood does not initially involve bacteria but other microorganisms; on the other hand, ruminants such as cows use bacteria to help them m
What would a gram positive bacteria look like if you forgot the alcohol step during the Gram stain procedure? Why? What would a gram negative bacteria look like if you forgot the alcohol step during
I am well aware of the phenomenon of neurogenesis induced by exercise, as well as the dopamine release that results from exercise. I am really interested in neuropsychology and the effects of exerci
I was learning about mitosis and meiosis in school and had a question. I know in Mitosis you first start off with a Diploid (2N) cell and then end up with two daughter cells that are also Diploid.
I was a fool and dissolved my antibiotic (Kanamycin) into Tris Buffer rather than H?O. The Kanamycin still seems to be active but a fellow labmate mentioned that Tris messes around with the membrane
While speaking with my co-workers, the topic of tumors growing things came up. The examples were (and backed by images) of tumors growing a tooth, hair, and sometimes even more complex objects such
As the old joke goes, "God must have been a civil engineer. Question: Who else would put a waste facility straight through a recreational area?"
Most people I asked answered: "There's a difference because it's transformed into energy, like heat...". I think that's bull-excrements. There's still the law of conservation of mass: our body does
I'm not sure if this is actually a philosophical question, but I was reading a timeline of life on earth and I came to this:4500-3500 Ma The earliest life appears, possibly at Alkaline vents with the