Plants are generally considered to be more basic forms of life than animals. They cannot speak, or walk; they do not have powers of reasoning or conscious thought.
Or do they?
Scientists are now coming around to the idea that plants are sentient living beings, with a sophisticated awareness of their surroundings. Not only that, but research shows that they can communicate with one another, can pay attention to stimuli, have the capacity to memorize information. Charles Darwin was ahead of his time when he wrote his book "The Power of Movement in Plants", though at that time he was alone amongst his peers with this viewpoint.