What is a potential problem with the use of transgenic varieties of plants that contain Bt toxin?
◦ Transgenic crop varieties with Bt toxin require large amounts of chemical insecticides to grow.
◦ Bt toxin may be harmful to humans.
◦ Bt toxin may be harmful to some beneficial insects.
◦ Transgenic crop varieties with Bt toxin are not very hardy and require a lot of care.