The answer is,Different animals with similar structures:)
the believe they move inside the membrane which is creating a gradient
I am thinking D but I'm not sure♀️
They are among the first
colonizers of an environment. This way they break down rocks and make nutrients available for other plants. They help in retention
of water in a habitat and also shelter many microorganisms.
They also decompose organic matter hence play an
important role in the cycling of nutrient in the environment.
