Why might the lungs of smokers look dirtier than those of nonsmokers, assuming all other aspects of their lives are similar? What organelle is involved?
What will be an ideal response?
The cilia in cells lining respiratory passages normally sweep debris from those tubes; however, in cigarette smokers, the cilia are immobilized. Therefore, the lungs of smokers would logically accumulate more airborne contaminants.
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What mechanism is responsible for making sure that a daughter cell is identical to the mother cell?
What will be an ideal response?
Mendel called crosses involving two traits ____________________ crosses
Fill in the blank(s) with correct word
Although whole-genome duplications that result in polyploidy are fairly common in plant species, which of the following are common in other eukaryotes?
A) duplication of whole chromosome arms B) segmental duplications of small gene regions C) deletion of an entire haploid set of chromosomes D) whole chromosome loss E) miscellaneous aneuploidies in living members of a species
Physicians have used imaging techniques for medical diagnosis for some time, but recently have begun usage of magnetic resonance imaging (MRI), which depends on _____.
A. ultrasound B. X-rays C. the behavior of hydrogen atoms in water molecules in a strong magnetic field D. sound waves