an animal able to live both on land and in water.
animal (amphibian) native to the Americas and considered an invasive species in Oceania and islands of the Caribbean.
reptile native to parts of Africa, Asia, and the Americas.
to discharge a substance from the body.
person who cultivates land and raises crops.
group of cells that secretes a chemical useful for the body to function.
type of animal that breathes air and has a body divided into three segments, with six legs and usually wings.
person who studies the natural history or natural development of organisms and the environment.
process of removing unwanted species (pests) from a specific geographic area.
substance that harms health.
animal that hunts other animals for food.
tall grass that is harvested to extract sugar from its sap or juice.