Without ____, living organisms would often experience major changes in pH in their cells
a. buffers
b. acids
c. surface tension
d. nonpolar bonds
e. bases
A
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Organisms that may cause red tide are
A. green algae. B. brown algae. C. dinoflagellates D. euglenids.
Red algae:
a. can live at greater depths than green algae b. are thought to have developed from green algae c. contain xanthophylls as their main accessory pigments d. contain no chlorophyll a e. are mostly freshwater algae
A mutation in the gene for hormone A causes it to be unable to bind to its receptor protein. What do you predict will likely happen?
A) The receptor protein will not be activated and therefore will not initiate a signal transduction pathway. B) The receptor protein will change shape in order to bind with hormone A. C) The hormone will bind with a different receptor instead.
Why is vaccination for rubella recommended?
A) It has a high mortality rate in school-age children. B) Death from secondary infections is common. C) There is a high incidence of congenital infections and birth defects. D) Health care workers have a high incidence of infection. E) It is no longer recommended; rubella has been eradicated.