Help I'm bo red in Science Class with a Sub. InPerson

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy

In which of the following relationships is one organism always benefited while the other organism is always harmed

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called