Sandra is growing mums in her backyard and wants to determine how much water she should give the plants to produce the most flowers. Plant A receives only rainwater and is given no additional water. Plant B receives rainwater and an additional cup of water per day. Plant C receives rainwater and an additional two cups of water per day. All mums are given the same amount of sunlight and fertilizer. a. Control Group b. Experimental Group c. Independent Variable d. Dependent Variable e. Constants

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .