Question

One of the major difficulties in the biological control

Answer 1

Resistivity : when a conductor has length 1m

and cross sectional area is 1m²,then resistance of conductor is called resistivity.

R=pl/A

put l=1m and A=1m².

R=P

this resistance is called resistivity.

resistance of a conductor depends on dimensions of the conductor(volume ,length,area).

Answer 2

Explanation:

the major difficulties in the biological control of insect pests is that the predator develops a preference to other diet and may itself become a pest . biological control is mainly refers to the, introduction of living organisms which destroy other harmful organisms

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