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Q. What differences in detail do you notice in freshly prepared versus permanently mounted tissue? How did the steps of preparations (with fresh microtome samples or staining and fixing of permanent mounts) affect the appearance of the samples? Tabulate some advantages and disadvantages of each. What component of root-tip cells is stained by Safranin in the permanent mount of a longitudinal section of a corn root tip? What component of root-tip cells does Fast Green stain? What could different stains such as these indicate with respect to cell division, differentiation, and function?
Genophore is a term coined by Hans Ris to denote.
what are some proteins that cause diseases, how do they cause the disease and what is the function of the proteins?
In a population of 100 Walruses, 30 have short whiskers (the recessive trait). The rest of the walruses have long whiskers (the dominant trait) with 30 heterozygotes.
Do you really think the age of the man is main in determining the chance of chromosomal abnormalities? Why or why not with appropriate reasons. Describe a single meiosis event.
Urine excreted by mammals contains many valuable molecules such as glucose and amino acids, but they are at much lower concentration in excreted urine than in blood.
A signalling pathway in the cell is turned on by phosphorylation, leading to decreases in cell division. What is the effect of a mutation that results in the overexpression of an oncogene coding for a phosphatase that works on this pathway?
Arthropods are the most diverse group of animals. Describe some characteristics of arthropods that may have contributed to their great evolutionary success.
Make a short essay on mechanisms by which redox reactions in mitochondria lead to the production of ATP by phosporylation of ADP to ATP
Compare and contrast the reproductive cycle of a non-vascular plant versus a vascular plant versus a multi cellular animal.
The fish gill has filaments containing blood vessels, capillaries are in lamellae. Usually the blood flows through the capillaries in the OPPOSITE direction as water flow.
How many genes are involved in the growth behavior phenotype, and was must the genotypes in the cross be? Assume recessive loss- of function mutations are involved.
How did the rmp change with the low na ecf solution. Discuss at least three practical, scientific, and ethical issues that may be raised by such a change in naming.
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