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How does the immune system of vertebrates utilize a chemical concentration gradient?
a.The vertebrate immune system does not use chemical gradients.b.The immune system releases chemical signals called chemokines, which create a chemical gradient that leukocytes use in migrating toward the infection site.c.The immune system generates a gradient of reactive oxygen intermediates to increase the amount of toxic radicals and peroxides to combat invading pathogens.d.The immune system produces thousands of histamines that act solely to create a histamine diffusion barrier.
Assume you have a population of 3,320 AA; 640 Aa; and 12 aa genotype. Calculate the relative fitness w, and the selection coefficient for each 3 genotypes
On average, how many complete turns would be in each chromosome. The human gametes have about 3 billion bp of DNA in their chromosomes.
Water softeners often replace calcium ions in hard water with sodium ions. Since sodium compounds are soluble, the presence of sodium ions in water does not cause the white, scaly residues caused by calcium ions. However, calcium is more beneficia..
what kind of lever is one involving the dorsiflexion of the foot and the anterior tibialis? In this action what is the fulcrum, force and resistance?
Snouters are not so big critters that live on both sides of the Ohio River. A population on the north side of the Ohio River is fixed for an allele for blue feet.
Intravenous injections are commonly performed with a hypodermic needle and syringe. Suppose that the dimensions of the needle are length = L,
A sample of a gas occupies 1.40 x 103 mL at 25oC and 760 mmHg. What volume will it occupy at the same temperature and 380 mmHg?
what is the final concentration be in micromolar
Explain the cells you were able to see in the blood smear. Are they different than bacterial cells you have observed.What is the reason of immersion oil?
If you wanted 10mL of a 1mM nitrophenol solution and you have on hand a 50mM nitrophenol solution, how would you make it. If you wanted 100mL of a 0.1M acetic acid solution, how much 17.4M acetic acid and how much water do you need to add to make t..
Describe the importance of adding NaOH at the end.
What could be the base sequence of the RNA after transcription happens? Explain the importance of first and last codons? Specify the meaning do these codons have for the protein synthesis?
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