Question

bio 170 organismal bio lab

Phylum Porifera Cnidaria Platyhelminthes Place Nematoda Filesios Mollusca octopus wa Annelida Arthropoda bulacan Echinodermata which Chordata un

need help filling out last 4 questions!

Answer 1

First the movement occur by beating cilia the head moves from anterior to posterior part in a forward Direction.

When the head of worm touched with needle it moves away from the touch source and show thigmotactic movement where the the part which was touched moves away from that source.

When a worm is turned over its back first they will shrink their body parts and after that tries to gain the position which they had before .