During meiosis, a defect occurs in a cell that results in the failure of microtubules, spindle fibers, to bind at the kinetochores, a protein structure on chromatids where the spindle fibers attach during cell division to pull sister chromatids apart
. Which of the following is the most likely result of such a defect? A) New microtubules with more effective binding capabilities to kinetochores will be synthesized to compensate for the defect.
B) Excessive cell divisions will occur resulting in cancerous tumors and an increase in the chromosome numbers known as polyploidy.
C) The defect will be bypassed in order to and ensure normal chromosome distribution in the new cells.
D) The resulting cells will not receive the correct number of chromosomes in the gametes, a condition known as aneuploidy.
D
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Cells save energy and materials by using many of the same enzymes for both ________ and ________.
What will be an ideal response?
Virulence may be measured experimentally at the host level by the ________, which measures the number of pathogens that kills 50% of an experimental group of hosts within a specified amount of time.
Fill in the blank(s) with the appropriate word(s).
Microtubules are assembled from ____
a. keratin b. myosin
c. laminin d. actin e. tubulin
When a cold ocean current brings rich nutrients to the surface and influences the climate of the region, it is called a(n)
A. upwelling. B. lake effect. C. guano. D. profundal zone. E. monsoon.