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SPECIES PRONE TO EXTINCTION

Teacher: Mr. Prussman
Horizontales
One of the primary threats to these Mussels is __________.(P3)
According to the graph shown on page 41 in the text, the number of mussels with a length between 20 and 25 mm is ________. (41)
The mussels live in lakes and _____in the Mid-Atlantic States. (P1)
In a Normal distribution, the data are grouped ________around the Mean. (41)
The dwarf wedge mussels are very sensitive to _____ metals such as Zinc, copper and Cadmium. (P4)
Verticales
A species which is likely to become endangered if it is not protected is called a__________ species. (263)
An early stage in the life cycle of these mussels is the parasitic _______ stage called glochida. (P3)
A fresh water species called the Dwarf Wedge ________is an endangered species.
The mean length of the dwarf wedge mussels according to the normal distribution curve shown is about______ mm in length.(41)
The shape of a normal distribution curve is a _____. (41)