Vestigial structures by: Kaleb McCullough

http://www.amnh.org

    1) The Tetra fish actually has vestigial eyes that dont work. Although the Tetra fishes ancestors did have a use for these vestigial eyes.

    2) Pythons, and boas have small legbones buried in muscled toward the end of their tail. .

    3) The Apendix is belived to be remains of a much larger plant digesting organ that our ancestors probbly once had.

http://www.darwinwasright.org

   1) A Vestigial structure is a genetically determined structure that has lost its use from the time our ancestors had it.

   2) Yes there is such thing as vestigial behavior. An example is when we get scared we get goose bumps.

   3) Yes, the  plica semilunaris is a vestigial structure belived to once be part of a nictitating membrane.

http://www.newworldencyclopedia.org

   1) Yes, not only animals have vestigial structures, plants can have vestigial structures called vestigial parts.

   2) No, If the organismsm ancestor didnt have the structure, it would not be vestigial.

   3) After darwins theory of evolution the reason, or cause was speculated upon.

http://io9.com

   1) There is a part of our ear that is considerd a vestigial structure. There is a group of muscles, that for a monkey would allow them to move their ears, besidedes the verry few that can wiggle their ears this structure is useless for us.

   2) Yes there actually is. Our Tonsils much like the Apendix dont serve much of a purpose. actually they're more likely to become inflamed and dangerously infected than to serve any perpouse.

   3) Palmar grasp reflex is less of a structure, but more of a vistigial behavior. When a finger or similar object is placed in the palm of an infant, as many as thirty seven percent of them are able to grasp with enough strength to support their own body weight when suspended into the air.

http://askjohnmackay.com
   1) Arm swiging is considerd a vestigial leftover from when our ancestors walked on all fours.

   2) lots of types of insects have wingless varieties, and these have been tested and proven to have evolved to suit unusual environments

   3) Darwins point is a vestigial struture on humans on the edge of the ear causing minor disturbance in the formation of the ear. This structue can be found on about ten percent of humans.

   4) Un like most flowers dandelions have normal reproductive organs, wich means dandelions dont need pollen to have a seed. This makes dandelions a very special flower in the flower comminity.