Ques: Q: By breaking down wastes and remains of dead organisms, decomposers perform what function in an ecosystem? Choices: - reproduction - symbiosis - collecting - recycling A:
Ans: recycling

Ques: Q: The pelvic girdle, consisting of a hip bone, serves to attach a lower limb to this? Choices: - exoskeleton - appendicular skeleton - cytoskeleton - axial skeleton A:
Ans: axial skeleton

Ques: Q: Sodium-potassium pumps help nerve cells establish a voltage across their what? Choices: - potassium membranes - sodium membranes - cell walls - plasma membranes A:
Ans: plasma membranes

Ques: Q: Rubber is an example of what type of substances that do not allow electrons to move through them? Choices: - conductor - semi-conductor - solids - insulators A:
Ans:
insulators