GB_1713_L19_Invertebrates

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Invertebrates Pre-Lab Questions 1. Before reading the introduction, were you familiar with examples of species from each of the eight phyla? Explain. I was familiar with at least one example species from every phyla except chordate, I have never heard of tunicates before. 2. What is the main difference between the Cnidaria and the Platyhelminthes phyla? The main difference is that Cnidaria have radial symmetry and Platyhelminthes have bilateral symmetry. 3. Conduct your own research to locate images/charts/figures that illustrate the evolution of invertebrates. Pick the one you found most useful, insert the picture below and write a one paragraph summary of what you learned from this image and why you like this one the best from those that you viewed. I like this image the most because it shows step by step how the current phylums came to be. There were other charts that had pictures that were easier to understand but they didn't go into as much detail. I like how much detail is in this picture about the how and when of the evolution of invertebrates. ©eScience Labs, 2018

Experiment 1: Symmetry in Nature Images radial symmetry: the arms move outwards into even sections from the center Organism A bilateral symmetry: the animal can be split in half into two mirrored images Organism B ©eScience Labs, 2018

Asymmetrical: there is no symmetry Organism C Asymmetrical: there is no symmetry Organism D ©eScience Labs, 2018

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bilateral symmetry: the animal can be split in half into two mirrored images Organism E Post-Lab Questions 1. Pick 5 additional animals and explain the type of symmetry displayed by each animal. dog:bilateral symmetry cat:bilateral symmetry daisy:radial symmetry boulder: asymmetrical most trees: asymmetrical ©eScience Labs, 2018

2. What type of symmetry do humans have? bilateral symmetry 3. Research and determine if there are any other types of symmetry in organisms. If so, describe them. There is spherical symmetry which has the same density throughout the entire circular body. Experiment 2: Creating a Phylum Key Data Tables Table 2: Phylum Taxonomic Key Porifera Cnidaria Platyhelminthes Annelida Arthropoda Mollusca Echinodermata Speciali zed cell, but no tissues Hollow body cavity for food Three tissue layers, no body cavity Bilateral phylum with segment ation The first phylum to fly Most have a calcium- containin g shell Five-part symmetry Spicule s are the skeleto n Some have stinging cells Parasites Setae used for moveme nt The first to have jointed legs Mantle of tissue covering the body Hard but flexible bodies with small plates No symmet ry Some stationar y polyps Simple animals with bilateral symmetry Body design is a tube within a tube Exoskeleto n Radula used to feed tube feet Water flows through canals of body First muscles and nerves Tubular mouth at the mid-body Their burrowin g has affected the global climate Champions of variations in appendage s Some propel using their siphon all live in the sea No Some Entrance and Muscular Have spines ©eScience Labs, 2018

Porifera Cnidaria Platyhelminthes Annelida Arthropoda Mollusca Echinodermata symmet ry are mobile medusa exit the same in the digestive tract foot used to move covered with a thin skin Station ary animal Post-Lab Questions 1. How challenging was it to place all the characteristics under the correct phylum? Not very 2. Which characteristics were you most unsure about? Explain. Entrance and exit the same in the digestive tract because I couldn't find it specifically saying this anywhere in the lab. 3. Can you think of other characteristics of invertebrates that could have been included in this exercise? Try your best to think of at least two and indicate which phylum those characteristics belong to. produces only sexually: arthropoda has some hermaphrodites:mollusca 4. Pick one type of invertebrate, either one mentioned in the introduction or another species. Answer the questions in this key . ©eScience Labs, 2018

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a. Did the key correctly identify the type of invertebrate you picked? Yes b. Did you learn something new about the type of invertebrate from this website? Explain. I learned that animals in the annelida phylum can be hermaphrodites just like organims in mollusca can be. ©eScience Labs, 2018

Exercise 3: Taxonomy Organism Identification Organism A ● Phylum:platyelminthes ● Criteria: bilateral symmetry Organism B ● Phylum:mollusca ● Criteria : soft body Organism C ● Phylum:porifera ● Criteria looks like a sponge Organism D ● Phylum:echinodermata ● Criteria 5 part radial symmetry Organism E ● Phylum:arthropoda ● Criteria: flexible exoskeleton Organism F ©eScience Labs, 2018

● Phylum:cnidaria ● Criteria : tentacles Post-Lab Questions 1. Which of the organisms did you find most challenging to identify? Why? the octopus because it didnt have hard shell like many organisms in the mollusca phylum have 2. Why is the field of taxonomy in a constant state of flux? becasue we are constantly finding new creature and discovering new things about old ones. 3. The introductory material discusses how taxonomic classifications have changed over time. Discuss how any of the organisms you classified in this experiment might be mistakenly placed in a different phylum than what is currently accepted as the correct phylum for that organism. the octopus couldve been put into the cnidaria phylum accienlty because it has tentacles. ©eScience Labs, 2018

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Experiment 4: Invertebrate Dissection Post-Lab Questions 1. Were you able to locate all the structures mentioned in the directions above? If not, list those that you could not locate. 2. Draw the feature that you found most interesting as you dissected the starfish. 3. What surprised you the most about the anatomy of the starfish? Explain. 4. What are some common animal traits that a starfish does not possess? ©eScience Labs, 2018

Related Questions

Clam I need help with the following questions about Clam When dissecting a clam, what functions of the parts are observed? What is the general feeding strategy of the clam, and how does the digestive system allow it to behave in that way? What is the nature of the circulatory system (open or closed) and is the clam acoelomate, pseudocoelomate, or true coelomate? How does the clam reproduce, obtain oxygen, and get rid of waste?

EXERCISE 9: Introduction to the Animal Kingdom Part 2: Modes of Digestion and Respiration, and Rotifera, Platyhelminthes, Annelida, and Mollusca Pre-lab questions (due at the start of the lab period) 1. You will examine four different phyla this week. Which of these four are coelomates? Which of these four are pseudocoelomates? Which of these four are acoelomates? 2. Epithelial tissue can be found as six different types. Examine the table below and place an X in the cells box corresponding to the description(s). The first type has been done for you as an example. Square Tissue Type Single layer Multiple layers Thin/Flattened Elongated cells Simple cuboidal Stratified cuboidal Simple columnar Stratified columnar • Dratiets Punch Simple Squamous Stratified squamous X Cells X tead ka time sinal ice ho various body plans exhibited by members of the animal kingdom

Answer 10-13 only

Review Questions Answer the review questions below. The phyla we viewed today were the porifera, the cnidaria, the nematoda and the arthropoda 1. Which phyla exhibited bilateral symmetry? 2. Which phyla had no true tissues? 3. Which phyla contained parasitic organisms? 4. Which phyla were coelomates? 5. Which phyla exhibited cephaliziation? 6. Which phyla that you viewed today contained specialized appendages? 7. Which phyla exhibited radial symmetry? 8. Which phyla were pseudocoelomates? 9. Which phyla had a complete digestive system? 10.Which phyla were multicellular? 11.Which phyla were asymmetrical? 12. Which phyla were acoelomates?

Please answer I'll give a good rating

Answer the review questions below. The phyla viewed were the platyhelminthes, mollusca, and annelida. 1. Which phyla exhibited bilateral symmetry? 2. Which phyla contained parasitic organisms? 3. Which phyla were coelomates? 4. Which phyla exhibited cephalization? 5. Which phyla that you viewed today contained specialized appendages? 6. Which phyla were aceolomates? 7. Which phyla had an incomplete digestive system? 8. Which phyla contained a shell? 9. Which phyla contained hermaphrodite organisms?

Please do asap

please help me answer problems #1-5. thank you!

Answer the last three questions

Q24

PLEASE HELP!!