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Clearly selection pressure will not result in organisms that are better equipped to avoid agents of mass extinction such as the major asteroid impact at the end of the Cretaceous. Yet there is increasing evidence that mass extinctions are selective even though they follow different rules to "background" extinction. What characteristics of lineages or clades might make them more or less likely to survive a mass extinction?
Robert, a smoker, is 52 years old. He has elevated blood pressure, in part, due to an elevated erythrocyte count. Knowing that smokers often have reduced plasma O2 levels, explain in detail (in a paragraph) why his erythrocyte count is elevated.
Unexpectedly, a missense mutation found in a protein-coding gene is no longer causing problems for the cell due to the presence of this mutant tRNA. Before the missense mutation in the protein-coding gene, what was the unique encoded amino acid.
A population with a type 3 survivorship curve is most consistentwith which of the following?
what is the mechanism driving the bromothymol blue solution color change? This is a quesiton from my bio lab as how cellular respiration occurs in germinated beans, dry beans, or no beans at all. Anyone know?
How many of the 16 possible zygote combinations would be expected to contain only two dominant genes and what is the probability that the son of a female carrier of haemophilia and a normal male will be haemophiliac
Identify the type of cancer you are going to research. Generally, explain what it is and what part of the body it affects.Describe the cancer in biological terms at the level of the cell and at the level of the major organ system it affects.
Determine pseudodominance and how is it produced through a chromosome deletion and how does bacterial DNA differ from eukaryotic DNA?
The process by which organisms acquire DNA from different species is most accurately referred to as.
q1. what were the main discoveries obtained by the planetary missions of the sun? illustrate the structures of the sun
Describe the structure, function and location and permeability characteristics of the capillaries, sinusoids, and cappillary beds.
Pompe's disease is one of a class of lysosomal storage diseases in which one or more enzymes that are normally found in the lysosomes are defective or absent. In Pompe's disease, the enzyme that normally breaks down glycogen is absent.
In Leghorn chickens colored feathers are produced by a dominant allele, C; white feathers are produced by the recessive allele, c. The dominant allele, I, of another independent gene inhibits expression of color in birds with geno-types C/C or C/c.
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