Population biologists are concerned about introduced species such as the zebra mussel in north america because
a) their removal from their native habitat has a negative impact
b) predators of the introduced species often overpopulate because of the influx of the introduced species
c) the introduced species compete for resources more effectively than native species
d) introduced species often become endangered when they are placed in a new habitat
e) their introduction will require more land to be protected

Answer is C.

Explanation:

Note that , the introduction of a specie to a new habitat could be done based on one major condition which is to create a balanced environment.

1. to chase away or eradicate the native specie especially if they are parasitic in nature, or

2. to prevent an endangered specie in an environment from going into extinction.

In other word, when the second option is being considered, a biologist must be able to guide a against or prevent a situation whereby the introduced specie will put the survival or the live of the native specie in danger. Thereby, creating an avenue where the available resources will shared in a sufficient percentage.

C) introduced species compete for resources more effectively than native species

Explanation:

The zebra mussel is an invasive species which lacks natural controls and predators allowing them to reproduce quicker and consuming more resources more effectively than the native species

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