A study reported that high levels of phthalates in a pregnant woman could lead to ____ in their sons
a. undescended testicles
b. smaller genitals
c. feminized genitals
d. enlarged breasts
e. cancer
ANSWER: a
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When culturing a chemoorganoheterophic bacterium, what outcome is LEAST likely to occur if ammonia and phosphate are provided at equal concentrations?
A) Cells require much less P to grow than N, so extra P will be used for ATP synthesis and result in a faster growth rate. B) Cells will never consume all of the phosphate, because N is needed in higher quantities than P. C) The final biomass of cells will be no different than if only 50% of the phosphate was provided. D) The bacteria will import all of the ammonia to use for biosynthetic pathways.
Which cells are alive at maturity?
a. sieve elements b. vessel members c. tracheids d. vessel members and tracheids e. sieve elements and vessel members
A woman running a marathon collapses at the finish line and is rushed to the hospital. The physicians determine that she has lost a large amount of water and salts from excessive sweating. The appropriate course of action for the physicians would be to
determine the woman's intracellular fluid levels so that they can provide a fluid replacement therapy that will A) regain isotonic conditions of salt and water. B) regain hypertonic conditions of salt and water. C) regain hypotonic conditions of salt and water. D) provide a measure of metabolic heat production.
Which group of adult tissues is derived from the mesoderm?
a. lining of the digestive tract, liver, pancreas b. muscles, bones, cartilage c. skin, brain, retina d. skin, liver, pancreas e. lining of respiratory tract, thyroid gland, urinary bladder