The outer layer of the sponge is covered by flattened cells that sometimes contract in response to potentially harmful stimuli to protect the inner cells of the sponge. One type of inner cells are , flagellated and collared cells that help circulate water through the sponge and collect food particles. Various types of cells are found in the mesohyl and may secrete structural components such as spicules or spongin fibers

Which of the following is an example of competition that could be found in a forest? question 14 options: deer eat berries and their droppings seed new areas creating more berry bushes two fox populations utilize the same rabbit population as their main food source two hawk populations utilize the same scorpion population as their main food source lack of sunlight due to changes in the seasons restricts the growth of certain plants