Answer:
Almost 20 years later, the number of zebra mussels has declined overall. And parts of the ecosystem, such as the number of zooplankton, native mussels, and clams, have started to increase.
The effects of the zebra mussel invasion on the Hudson River ecosystem has greatly reduced only 20 years after this invader appeared in the river.
They are organisms that have life and carries out all the characteristics of living things including; movement, respiration, nutrition, irritability, reproduction, growth adaptation and others
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