You are presented with the question "What doesn't protect plants?" and the following answer choices: - viruses - smallpox - herbicide - steroids - A virus - Nematoda - chickenpox - cigarettes Now knowing that apesticide is used for protecting plants by killing insects and plants are poisoned by herbicides, animals by pesticides, choose the best answer.
herbicide

You are presented with the question "What can reduce respiratory system capacity?" and the following answer choices: - Breathing - Smoking - influenza - bacteria - Pollution - Exercising - Pesticides - Singing Now knowing that smoking causes direct damage to the lungs and when lung damage is experienced, frequently the total capacity of the respiratory system is reduced, choose the best answer.
Smoking

You are presented with the question "What converts chemical energy into mechanical energy?" and the following answer choices: - rocks - batteries - water vapor - monkeys - cats - a car - cows - rockets Now knowing that an automobile engine transforms chemical energy into mechanical energy and cars have V-8 engines and are functional, choose the best answer.
a car

You are presented with the question "_ are passed from lower to higher trophic levels" and the following answer choices: - fossil fuels - rays or beams - nutrients - environment - animals - heat produced - Most plants - Light Now knowing that energy is passed up a food chain or web from lower to higher trophic levels and an example of chemical energy is food nutrients, choose the best answer.
nutrients