Which of the following is an example of a species changing over time. choose all answers that are correct. a. a gardener notices a new kind of squash growing after he only planted seeds from his previous squash plants. b. a rabbit's ears are bigger than a mouse's ears. c. some weeds have become resistant to a chemical designed to kill them. d. the purple- spotted butterflies in your collection have more spots than the purple-spotted butterflies your grandfather collected when he was a child. e. a giraffe's neck is longer than a deer's neck.