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.