What is tom regan’s position about the use of animals in research and agriculture?

Tom Regan's position about the use of animals in research and agriculture is that animals should never be used for medical research or commercial agriculture. 
Tom Regan was a famous American philosopher who was mostly interested in animal rights. He believed that animals shouldn't be put through any testing or experiments because we don't have their consent to do that. He believed it was unethical to do that.

C. a mature ovule of a plant.