## Question

###### Procedure: 1. Cladogram Of The Basic Animal Groups Covered in This Lab. Section 1 Questions on...

Procedure: 1. Cladogram Of The Basic Animal Groups Covered in This Lab. Section 1 Questions on the cladogram and reading. After reading the introduction information and look at the cladogram (figure 1) answer questions 1 to 19 on the answer sheet. Note that you will need to use the terms described in the introduction to the lab so make sure that you have read this material thoroughly before starting Chordata opoda Annelida Mollusca Echinodermata notocord shell adult I radial symmetry segmentation exoskeleton Section 2 Macro-Invertebrates 1. Look at the sea anemones in the marine tank at the back of the lab. These are members of the Phylum Cnidaria. Your instructor may feed the anemones during the lab, but you should not open the aquarium. What kind of symmetry do they have? radial symmetry is a complete gut present? Do they have a skeleton? no Look at the boxed Cnidarian specimens to see the variety of animals that are cnidarians. Name several characteristic specimens and fill in the column under Cnidaria on the chart on your answer sheet segmentation endoskeleton Nematoda 2. Look at the boxed Platyhelminthese specimens to note the types of animals that are flatworms. Google "flatworm moving and watch a video of this action. Google "flatworm microscope moving and watch a flatworm move microscopically. How does it move? Is it segmented? FW in the proper column in the chart. eucoelom pseudocoelom hydrostatic skeleton elminthes y complete digestive system 3. Observe a live earthworm from the Phylum Annelida in the fingerbowl Notice how the shapes of the segments change as the worm crawls across the towels. Does this worm show homonomous or heteronomous segmentation? Observe the segmented worms on display in the annelids box. These worms all have a true coelom. Fill in the proper column on the chart. cephalization bilateral symmetry triploblastic Cnidaria et radial symmetry 4. Look at the boxes of specimens for the Phylum Arthropoda to see the variety of animals in this phylum. Is this homonomous or heteronomous segmentation? Identify the 3 tagmata of the insects and name them. How many tagmata does a crawfish or lobster have? Observe other arthropods on display. What is the nature of their skeleton? Fill in the chart. complete digestive system diploblastic multicellular 5. Look at the boxed examples of the mollusks and then look at the display of shells on demonstration to see the variety of animal types found in the Phylum Mollusca. Make careful observations concerning the other mollusks available. Refer back to the Protist Ancestor

## Answers

1) Phylum- Cnidariai) They are sedentary or free living.

ii) Mostely marine

iii) Radial Symmetry

iv) They have specialized cell called cnidocytes.

v) They are first time show tissue level organization.

eg- Hydra, Jelly fish, Sea anemone etc.

2) Phylum Patyhelminthes- (Flat worm)i) Mostely they ar eparasite thats why locomotary organs are absent.

ii) It is a ribbon like.

eg.- Tapeworm, Liverfluke, planaria etc.

3)

Phylum-Annelidai) Homonomus segmentation

4) Phylum- Arthropoda- Jointed appendages

- metamerically segmented

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