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Q1. In animal cells and in the meristem cells of land plants the nuclear envelope disintegrates during mitosis. This disintegration does not occur in the cells of most protests and fungi. According to our current knowledge of plant evolution, which group of organisms should feature mitosis most similar to that of land plants.
Q2. A comparative study of microbial size, using a stage micrometer, requires that you measure Bacillus subtilis in both the stained and unstained states. Would you expect measurements to be comparable in both preparations? If a variation in size is expected, how would you account for this difference?
They repeated the study with a larger number of samples but got the same results. What may be among their conclusions.
How is geological energy different from biological energy. Charlie has the blood test that shows a normal level of LDLs other than an elevated level of HDLs in his blood. Because his family has a history of cardiovascular disease, he wonders if he mu..
Choose one biotechnology example, such as agriculture, medical or historical, and provide at least two ways use of this biotechnology could benefit society and two ways this biotechnology could be harmful.
Illustrate one experiment that shows that shh is the critical molecule produced by the inducing tissue referred to in (a). what is the evidence that this tissue regulates the ventral pattern of the neural tube (even before this tissue was known to pr..
Water is most dense and therefore heavier at 4 degrees Centigrade. At zero degrees Centigrade ice forms and can float on liquid water. Assume ice were most dense at zero degrees Centigrade. Select the best explanation of what would happen in aquatic ..
What type of electrode would they need to use (express material and design)? Provide a simplified schematic (circuit model of the electrode) described in the notes. Also discuss at least two benefits of an exoskeleton as well as how arthropod grows ..
For in case, it is well established that in presynaptic neurons, the elevation of cytosolic calcium triggers the fusion of exocytotic vesicles that contain neurotransmitters to the plasma membrane.
A microscope has a field diameter of 2,000 microns under a total low power magnification of 100 X. This microscope has a 10X power ocular. Given this information, reply the following questions that appear below.
The trees derive no known benefits from the dwarf mistletoes but appear shorter than trees not associated with dwarf mistletoe. Which is the best describes the interactions between dwarf mistletoes and trees.
An inbred mouse that expresses Db and Kb is crossed with an inbred mouse that expresses no class I MHC. The F1 offspring are all DbKbKk.
Find out the genotypes of the parents and their pups. Use Punnett Squares to demonstrate your answers. What did Mendel observe in the F2 offspring that showed him that alleles for seed shape segregate separately of those for seed colour.
Approximately half of our vitamin K is synthesized by bacteria in the colon. Based on this information, why might taking a broad spectrum antibiotic produce frequent nosebleeds.
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