NEET UG 2020 — Organisms and Populations

Which of the following is not an attribute of a population?

Match the items in Column$-I$ with those in Column$-\mathrm{II}$: <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">Column$-I$</td><td colspan="2" rowspan="1">Column$-\mathrm{II}$</td></tr><tr><td>(a)</td><td>Herbivores-Plants</td><td>(i)</td><td>Commensalism</td></tr><tr><td>(b)</td><td>Mycorrhiza-Plants</td><td>(ii)</td><td>Mutualism</td></tr><tr><td>(c)</td><td>Sheep-Cattle</td><td>(iii)</td><td>Predation</td></tr><tr><td>(d)</td><td>Orchid-Tree</td><td>(iv)</td><td>Competition</td></tr></tbody></table>Select the correct option from following:

The impact of immigration on population density is: