Persistent pesticides are those that
require repeated high-dose use for optimum effect.
retain their popularity among u. s. farmers.
do not break down quickly or easily, and therefore become concentrated in organisms high on the food chain.
possess the greatest chemical toxicity.

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

Write the balanced chemical equation forphotosynthesis.

2. cheryl hears a new song on the radio every day during the week on her commute to work. surprisingly, when the song comes on at a party on saturday night, she knows most of the words without trying. describe the three ways that we use cognition to learn without reinforcement. which type of cognitive learning without reinforcement best explains how cheryl knew the song lyrics? explain your answer.