Jennifer is testing her ability to lift different weights. Which of the following could be a control variable? A. Amount of muscles
B. Time of day
C. Size of weights
D. None of the above

Rotenone is an insecticide that is toxic

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.

What are the three different shapes, or structures, of carbon-based molecules