The small air sacs at the tips of the bronchioles are the _________.
a) larynx
b) glottis
c) nasal cavities
d) alveoli
Ans: d) alveoli
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All of these statements about Chlamydomonas are true, EXCEPT
A. chlamydomonas has two flagella. B. each motile Chlamydomonas cell has a single haploid nucleus. C. chlamydomonas only reproduces asexually. D. chlamydomonas is photoautotrophic.
When tumor suppressor genes are ____ this significantly increases the chance of a woman getting cancer.
a. over-expressed b. under-expressed/deleted c. expressed d. all of the above
Protein that forms a channel to allow a particular molecule or ion to cross the plasma membrane.
What will be an ideal response?
Why is production of lung surfactant important for a baby?
A) Lung surfactant may block the placenta from exchanging oxygen. B) Without lung surfactant, the baby's lungs do not develop properly. C) Lung surfactant keeps the lung sacs from collapsing. D) Lung surfactant keeps the lungs from sticking to the diaphragm.