Which one of the following is a matching pair of certain organism(s) and the kind of association ?

Options

A. Shark and sucker fish - Commensalism
B. Algae and fungi in lichens -Commensalism
C. Orchids growing on trees -Parasitism
D. Cuscuta (dodder) growing on other flowering plants - Epiphytism

Answer

A

Explanation

Bell shaped polygonal pyramid indicates a stationary population having an equal number of yound and middle aged individuals . In triangular pyramid with broad base, there is a high percentage of young individuals. In urnshpaed pyramid, there is a low percentage of young individuals.