Which phyla have well developed nervous system

Study the diagram of a cell. which structure is found only in plant cells and functions in the process of photosynthesis? w x y z

Discuss the functions of epithelial connective nerviud and muscular tissues

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?