The skin gills of sea stars are structures
a. for the exchange of gases and excretion of ammonia.
b. of defense.
c. for movement.
d. that produce the skeletal elements.
c
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If real-time polymerase chain reaction (PCR) is performed on a Bordetella isolate, then it must be noted that this type of swab is unacceptable for collection because of the presence of which of the following inhibitory factors?
a. Dacron b. Cotton c. Rayon d. Calcium alginate
All of the following are common polyploidy crops EXCEPT:
a. broccoli b. coffee c. cotton d. potatoes e. wheat
Use the phylogenetic tree below to answer the following question(s).
Which of the following statement is correct regarding the phylogenetic tree above?
A. The polar bear and the brown bear are the most recently evolved species. B. The sun bear's closest relative is the sloth bear. C. Most bears on the phylogenetic tree are extinct. D. The American black bear has no closely related species.
If you removed the cuticle from the skin of an apple, the:
A) seeds of the apple would die. B) apple would absorb moisture and get soggy. C) apple would be inedible. D) apple would lose water and dehydrate.