Went two comparison groups within an experiment are identical except for one variable, the experiment is called a what? control experiment, variable experiment, uncontrolled experiment

This is a coral reef ecosystem. many biotic and abiotic factors affect the health of this ecosystem. which set correctly pairs a biotic factor and an abiotic factor?

What is the difference between how ionic and covalent bonds form

Below are the three main organs that make up the plant body. what is the main function of the structure that is identified as b in the picture above? it anchors the plant. it produces food. it absorbs nutrients. it supports the plan