secondary succession is the ecological succession that occursafter the initial succession has been disrupted and some plants and animals still exist. It is usually faster than primary succession as: ... Seeds, roots and underground vegetative organs of plants may still survive in the soil.

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energy and particles

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.