The muscles that cause goosebumps may be this type of organ, as are (*) kiwi's wings and the pelvic bones of whales.
The instinctive palmar grasp reflex is this type of behavior in human babies, and Robert Wiedersheim mistakenly included the pineal gland in his list of 86 of these structures. The muscles that cause goosebumps may be this type of organ, as are (*) kiwi's wings and the pelvic bones of whales. The human tailbone and appendix are examples of, for 10 points, what type of structure that served a role in an ancestor species but do not have a present function?
The instinctive palmar grasp reflex is this type of behavior in human babies, and Robert Wiedersheim mistakenly included the pineal gland in his list of 86 of these structures.
vestigial structures (accept "organs" or "behaviors" in place of "structures")