The role of a control in an experiment is A. Ensure the experiment can be repeated
B Prove a hypothesis is correct
C Provide a basis of comparison to an experimental group
D Prove that a hypothjesis is correct and ensure repeatability

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.

Kudzu vines grow by climbing and wrapping around trees. trees covered by kudzu can die because they are starved of sunlight. what type of relationship exists between the trees and the kudzu growing on them?

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems