A scientist studies the effects that barnyard grass, a weed, has on the growth of rice other weeds, and insects. The barnyard grass and other weeds, rice, and insects make up which level of the biological organization? A.)All the insects in North America.
B.)All the white tailed deer on a island.
C.) All the Bacteria in a digestive tract
D.) All the single-celled creatures in a sample of pond water