Blog

Inflammation on the sinus

Inflammation of the pleural cavity

Which of these factors does not affect hemoglobin’s affinity for oxygen (binding of O2 to hemoglobin)?

In the annelid tutorial, you were asked to compare the reproductive system of Ascaris, a parasitic nematode,  and an earthworm. The earthworm, an annelid, is a hermaphrodite.  The parasitic nematode is not.  Which of these lives in a habitat that has a low density of worms of their species?  [1]

Which of the following prevents the use of an earthworm’s body cavity to distribute absorbed nutrients to all parts of its body?

Choose the correct statement concerning the hydrostatic skeleton of an earthworm:

Yellow Jacket Foods most popular item is organic mustard. Demand is 600 jars a month. The firm’s  current vendor charges $3.00 a jar. Holding cost is $.35 per unit and it costs $100 to place an order for more jars of mustard. A new supplier (but with same order cost) has offered to sell the same item to Yellow Jacket Foods for $2.80 a jar if Yellow Jacket foods buys at least 3,000 jars each order. If the firm wants to minimize annual inventory and product cost, what should Yellow Jacket Foods do? This Problem Counts 2 Points

Which of the following global crimes was partially financed by the World Bank?

Tapeworms obtain nutrients from a host’s

You studied the class of annelids call Polychaeta, which gave you the opportunity to observe that Annelida is more than just earthworms. Answer the following questions about two of these polychaetes in the space below and label your answers as a, b, and c. If unable to see the image, use this link. One of the polychaetes that you learned about is the predator, Nereis (shown above). As an active predator it has high demand for oxygen.  Nereis has appendages called parapodia.  a) Describe one way that these appendages are anatomically adapted as a gas exchange structure. (Consider what characteristics make an effective gas exchange structure). Another polychaete that you learned about is the featherduster worm that lives in a self-made tube and is immobile.  b) What is the feeding strategy of this polychaete?   c) Describe how , anatomically, the anterior end of the worm is adapted to suit its lack of movement and feeding strategy.