Nitrogen and oxygen make up about 99%of the atmosphere. I'm not sure if it will help! But thats all I know.
Answer: A. True.
Explanation: A substance or material is hazardous if can be dangerous to a susceptible agent. This susceptible agent can be a human being, an animal, a plant, a fungi or any other living form, or an environment agents like water, soils, air etc. that can be contaminated with it and later could be dangerous for a living forms.
Answer: tissues, organs, organ system
Explanation:
goes from top to bottom
The answer is D. Wild boars have a high reproductive rate and no natural predators.
