What effect can fertilizer runoff have on an aquatic ecosystem?
a.
increased plant growth leading to a decrease in fish populations
b.
increased plant growth leading to an increase in fish populations
c.
decreased plant growth leading to a decrease in fish populations
d.
decreased plant growth leading to an increase in fish populations

The correct answer is option a.  "increased plant growth leading to a decrease in fish populations".

Explanation:

Fertilizer runoff is an environmental concern caused by improper handling of crops by following improper gardening practices. Fertilizer runoff has a negative impact on water supplies by an increased of plant growth leading to a decrease in fish populations. Excess algae growth results in oxygen depletion which leads to an increase in the amount of nitrate-nitrogen in drinking water and a decrease in fish populations.

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answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus