What is the function of the excretory system? : )

a: transport nutrients
b: break down food
c: remove waste
d: respiration

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.

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