Zooplankton Populations in Lake Erie and the Hudson River Have

Multiple Choice

Zooplankton populations in Lake Erie and the Hudson River have declined by up to 70% or more since the arrival of zebra mussels because _______________.

A) zebra mussels carry a parasite that kills zooplankton
B) zebra mussels prey on zooplankton
C) waste from zebra mussels promotes bacterial growth that kills zooplankton
D) zebra mussels feed on cyanobacteria,which zooplankton need as a food source
E) zebra mussels block sunlight penetration into lakes and thus prevent zooplankton from photosynthesizing