Difine an enzyme in biology

Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere

Individuals do not compete directly for resources, but are prey for the same predator

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass