The main difference between a bar magnet and an electromagnet is... Group of answer choices

Bar magnets are always magnetic, electromagnets can be turned on and off

Electromagnets are always magnetic, bar magnets can be turned on and off

Bar magnets are always stronger

Electromagnets are always stronger

Which of these is NOT a way plants are classified

Group of answer choices

Warm celled and cold celled

Vascular and nonvascular

Flowering and nonflowering

Cone producing and non cone producing