B. Mutualism
Because the bird has food from the blackberries but the blackberry seeds are distributed when the bird disposes of the seeds and other blackberry plants grow in different areas
Answer:
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Explanation:
Essentially, guard cells are two bean-shaped cells that surround a stoma. As epidermal cells, they play an important role in gaseous exchange in and out of plant leaves by regulating the opening and closing of pores known as a stoma.
I HAVE NO CLUE BUT I HOPE YOU GET IT FIGURED OUT
Lumina or lumen is the space inside of tubular-shaped structures inside our body. The size of the lumina ranges from small to big. Medium-sized can be represented by open cavities within the esophagus, the small and large intestine, and the colon. Food passes<span> through the lumen of the esophagus.</span>