Ervin wants to perform an experiment to find out what type of wing allows a paper airplane to fly the farthest. He decides to test four wings, each with the same shape but with different lengths. He needs to keep his throwing technique and the wind speed constant for each test. Which is the independent variable in this experiment

What is the first step in a life cycle of a plant reproduce sexually

Plz ! for many generations farmers in north america have been choosing to cross corn plants with large ears of corn each year this results in the new generation of plants also growing large ears of corn. what is the technique called? a. selective breeding. b. natural selection. c. mitosis. d. asexual budding.

Which of the following statements is accurate about evolution? question 10 options: natural selection only eliminates odd individuals. evolution means that a population never has changes in its genetic frequencies. mutations are always harmful. evolution means that a population undergoes changes in its gene frequencies over time.