One purpose of the lymphatic system is to:
a. transport nutrients and oxygen.
b. returns interstitial fluid to the blood.
c. block the transport of blood proteins.
d. produce red blood cells.
e. deliver carbon dioxide to the heart.
b
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The term "sexually transmitted infection" is more accurate than "sexually transmitted disease" because it is a sexually transmitted pathogen may colonize host tissues without causing further damage to the host.
Answer the following statement true (T) or false (F)
A strain of E. coli is trp? his? lac?. Which medium would this bacterium grow on?
A) minimal medium with lactose as the sugar, supplemented with histidine and tryptophan B) minimal medium with glucose as the sugar, supplemented with histidine and tryptophan C) minimal medium with glucose and lactose as the sugar D) minimal medium with glucose as the sugar
Dissolved oxygen content in stream water is affected by
a. organic matter in the water. b. overgrowth of algae. c. water nutrient levels. d. all of the above.
The bulk of the energy required by the eukaryotic cell is generated by the mitochondria. The mitochondrion consists of cristae that
A) form a smooth, continuous outer membrane surrounding the entire organelle. B) form a complex fluid called a matrix outside the organelle. C) are elaborate folds on the inner membrane which hold the enzymes and electron carriers of aerobic respiration. D) are circular strands of DNA involved in producing the enzymes needed for anaerobic respiration.