Why don’t plants need a digestive system? a. they do not need nutrients to grow and develop. b. they use energy from the sun to make their own food. c. they create oxygen, which they use as food. d. they absorb water and food through their roots.

Which type of respiration takes place when there is no oxygen present

Adrought killed all the plants in an agricultural farmland. gradually, due to wind and some birds for. nearby areas, new plants started sprouting l. what stage of succession was taking place in the farmland? a) competition b) nudation c) ecesis d) reaction e) migration

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?