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One group of molluscs in particular,the _____________,serve as intermediate hosts for many harmful parasites.
Units
A measure of quantity used to express the amount of a product, service, or resource, often used in production and inventory contexts.
Pretax Income
Income earned by a company before taxes have been deducted.
Variable Costs
Expenses that vary directly with the level of production or sales volume, such as raw materials and sales commissions.
Fixed Costs
Financial obligations such as rent, salaries, and insurance that do not fluctuate with changes in production or sales levels.
Q3: The lophophore of ectoprocts is extended<br>A)by a
Q3: The urochordates are<br>A)called tunicates.<br>B)marine animals.<br>C)sessile as adults,but
Q11: The mud puppy Necturus<br>A)does not have gills.<br>B)does
Q11: The lophotrochozoans are now believed to include
Q12: Most geckos are small,agile,mostly nocturnal saurians.
Q16: The diapsid lineage gave rise to<br>A)the mammals.<br>B)the
Q16: Free-living flatworms have<br>A)ocelli.<br>B)tactile cells.<br>C)chemoreceptors.<br>D)all of these
Q28: The ophiuroids have no<br>A)pedicellariae.<br>B)papulae.<br>C)anus.<br>D)all of these
Q31: The energy accumulated by plants less that
Q48: In the earthworm,food is drawn into the