A membrane that allows only some materials to move in and out of the cell is B. Semipermeable.
Those are examples of ecosystem services! Hope this helps:)
Answer:
Hummingbird
Explanation:
Pollination is the process by which pollen grains are transferred from anther of a flower to stigma. It is a vital process required for reproduction of new plants.
Cardinal flower has two upper petals and three lower spreading petals. All the petals combine to form a tube at the base. Hence the flowers get a tubular shape. Insects can not enter the tubular flower easily so humming birds usually pollinate these flowers. The hummingbirds feeds on its nectar and pollinates the flower in the process.
