Bronchioles differ from bronchi in that they
A) warm air to body temperature.
B) contain only smooth muscle.
C) filter and humidify air.
D) can have alveoli attached to them.
E) are lined by a ciliated epithelium.
Ans; D) can have alveoli attached to them.
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What is the function of histone proteins?
A. organize DNA in eukaryotic chromosomes B. connect chromosomes to the mitotic spindle C. organize the microtubules that make up the spindle D. attach sister chromatids together
Why do some biologists use the name Craniata instead of the name Vertebrata?
A. Hagfish have a bony cranium but no vertebrae. B. Hagfish are too different from Cephalochordates to be included in that group. C. Hagfish are not represented by very many species, so cannot be given their own taxonomic grouping. D. Hagfish are understudied, so can only be grouped with other taxa based on their lack of characters.
If your mother and father both have cystic fibrosis, which is caused by a recessive allele, the odds of you having cystic
fibrosis are ____.
a. 1/4 b. 1/2 c. 3/4 d. 1 e. 0
Lisa has a rare genetic defect that causes acute sun-sensitivity. Her mother has the defect, but her father does not. All
of Lisa’s siblings, two brothers and a sister, are also affected. All four siblings are married, but none of their spouses has the mutant gene. Draw a pedigree for this family. Identify and explain the most likely mode of transmission for this disorder What will be an ideal response?