Which situation could cause an ecosystem to lose its equilibrium? A. Existence of a top predator species
B. Competition among species for food
O C. Loss of a keystone species
D. Interdependence among species

There are many ways that an ecosystem can lose it's equilibrium or balance. A few potential causes can be, the introduction of a new species, the sudden death of some species, and natural hazards (weather related or seismic changes).

Explanation:

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

light dependent reactions:

light independent reactions:

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