Exercise 8_Molluscs II

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 the following questions briefly but concise: 1. Justify the statement " Members of the Class Cephalopoda are the most complex mollusc". 2. Metamerism makes independent segmental movements possible.

For phylum Mollusca, Class Cephalopod  1. Characteristics. List whether the organism is:a. Diploblastic or triploblastic (if applicable) b. Deuterostome or protostome (if applicable) c. Coelomate, pseudocoelomate or eucoelomate (if applicable)    2. Organ/system characteristics. Answer the following for each organism:a. How is their circulatory system? b. Excretory/osmoregulation: How does the organism eliminate waste? What organs do they use?   3. Ecology. Describe/answer the following for each organism:a. Does it have a complete or incomplete digestive system? How does this animal feed?b. Identify any unique feeding structure• Be sure to use the correct terms to identify any unique feeding structure(s) used by the animal.

2:45 Animals Lab Part 1.pdf Figure 13.3. (A) Polyp and medusa forms of cnidarians and (B) a hydra poly 2. Obtain a preserved jellyfish specimen called "Goneonemus. Use your dissecting microscope to observe. Sketch the specimen in the space below. Dashboa... Student Sketch of Jellyfish Goneonemus Locate the following structures on your jellyfish and label them on your drawing. a. Gastrovascular activity-the central digestive cavity. b. Tentacles c. Cnidocystes-clusters of stinging cells in the tentacles 3. Obtain a live "Hydra" from the culture and observe it using your dissecting scope. Sketch the specimen in the space below. а Exercise Diversity of Life: Animals 123 124 Diversity of Life: Animals 12 Student Sketch of Hydrat Locate the following structures on your hydra and label them on your drawing a. Mouth b. Tentacles (how many does your hydra have?) c. Body stalk d. Gastrovascular cavity (seen through the body wall) 4. Observe the other specimens displayed at the counter. 2…

z 2 (Lecture)- Requires Respondus Lock 1. Sep 21 at 1:08pm z Instructions Question 1 The asconoid sponges have the simplest type of water canal system. O True False Question 2 Cnidarians are...

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Question:- 1.How is morphology related to food collection in protobranch and lamellibranch subclasses of bivalves?

For Phylum Mollusca, Class Cephalopod 1. Organ/system characteristics. Answer the following for each organism:a. How is their circulatory system? b. Excretory/osmoregulation: How does the organism eliminate waste? What organs do they use?c. Skeleton/support: List the structures or ways this organism supports itself.   2. Ecology. Describe/answer the following for each organism:a. Does it have a complete or incomplete digestive system? How does this animal feed?b. Identify any unique feeding structure• Be sure to use the correct terms to identify any unique feeding structure(s) used by theanimal.

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Briefly describe characteristics of the hypothetical ancestral mollusc, and tell how each class of molluscs (Caudofoveata, Solenogastres, Polyplacophora, Monoplacophora, Gastropoda, Cephalopoda, Bivalvia, Scaphopoda) differs from the ancestral condition with respect to each of the following: shell, radula, foot, mantle cavity and gills, circulatory system, and head.

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Q56 Select all that apply

II.Directions: Enumerate the following: 1. Domains of life(3) 2. Kingdoms(6) 3. Animal Phyla(9) 4. Classes under Phylum Porifera(3) 5. Classes under Phylum Cnidaria(4) 6. Classes under Phylum Platyhelminthes(3) 7. Classes under Phylum Annelida(3) 8. Classes under Phylum Mollusca(5) 9. Classes under Phylum Arthropoda(7) 10. Classes under Phylum Echinodermata(5) 11. Subphyla under Phylum Chordata(3) 12. Classes under Vertebrata(8) 13. Plants Classification(9)

Question:- 2.How might gill bacteria be important for survival in certain lamellibranch bivalves?

Hello , Happy New Year.  I do hope that you can help me about this. This is my report regarding biology. It needs parameters and observation.          Thank you in advance ❤️

1a. Briefly describe the general characteristics of nematodes, trematodes, and cestodes. b. Differentiate between monoxenous and heteroxenous life cycle, and give an example of a specific parasite each. c. Briefly describe the life cycle of protozoans.

14. Nematode Life Cycle Matching: Match each of the descriptions below with the correct nematode worm species (A-D). Note that some descriptions may not apply to any of the 4 species (in which case just write “none") and some descriptions may apply to multiple worms species (in which case write the letters of all applicable species). (A) Dirofilaria (heartworms) (B) Dracunculus (Guinea worm) (C) Ascaris (D) Hookworms 1. Life cycle includes only a single host 2. The infective stage is a free-living larva that can enter the skin directly 3. On target to become the first parasite-caused human disease to be eradicated 4. Has an arthropod intermediate host 5. Traditional treatment involves winding the female worm around a matchstick 6. Infections can be prevented by not defecating on soill improving sanitation of soil 7. Female lays eggs around the anus of the host 8. Produce microfilaria that circulate in the blood 9. Has multiple larval stages and a snail intermediate host 10. Migrate…

Please answer all three questions in the photo. Be detailed and accurate. Don’t use previous answers or versions. Do this completely and correctly please.

Flatworms (phylum platyhelminthes) Procedure 1. Observe the live planaria, if present, under the dissecting. If there are no live specimens, view this video: https://www.youtube.com/watch?v=w0QzSYQGsnA a. What type of symmetry does the planaria display? b. Does the planaria exhibit cephalization? c. Can you locate the planaria eyespots? What do the eyespots sense? 2. View the large planaria model. Make sure you can identify the pharynx, the eyespots, and the flame cells. a. Does the planaria have a complete or incomplete digestive system? b. What is the function of the flame cell? c. Are planaria hermaphrodites? d. Scientists say planaria have ladder like organs. Why?

1. What is the advantage of the countercurrent gas exchange in the case of some molluscs? Why is it not present in all representatives? 2. Discuss the diversity of the different molluscan groups in terms of body systems and adaptations. Are the differences necessary? Defend your answer.

Q9

Page < 3 of 7 4. Using forceps or tweezers, gently pull the 4th or 5th pereiopod to examine its motion. Do so without tearing the appendage off from the body. How would you describe its maneuverability? What are the limitations to motion of these walking legs? Given their small size and limited capacity for muscle attachment, how is it that this animal can use these appendages for motion? 5. Describe the structural differences between the pleopods and the pereiopods up the prawn. What hypothesis can you make regarding the functional use of pleopods by comparison? Pleopods of prawns are far larger in comparison to body size then crayfish (see drawings below). What might this tell you about their use between the two closely related animals? 6. Compare the overall body plan of the prawn to that of an insect like a grasshopper (see drawings below). Provide a complete side-by-side analysis of the two groups that would include body regions, and appendages. Focus your comparison on how the…

true/false 1. Siphonaptera has a laterally flattened body. 2. Sawflies have crochets on their prolegs. 3. Spruce Beetle (Dendroctonus rufipennis) is generally attracted to weakened or recently dead trees, and carries blue stain fungi. 4. Geometridae larvae have only 2 or 3 pairs of prolegs.

Q7: what are 3 correct answer options. There's 3 correct answer please answer all correct answer options

Hello, Please answer the following attached Biology question correctly and fully. Thanks!

able 11.1. Comparison of some representative specimens of cnidarians. Genera Observable stage (medusa, polyp or both) Other distinctive characteristics (solitary or colonial; symmetry; with or wlo deposits) Acropora Aurelia Fungia Hydra Table 11.2. Comparison of the main body regions and appendages of arthropods. Class Body Regions Attached appendages based on body regions Diplopoda Chilopoda Insecta Arachnida XISMATER

Topic: Earthworms 1. What is the function of the setae? 2. What is the function of the openings at segment number 14?

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Q7: Please match of the answers with the given options on the picture

I need help with a biology question: A paramecium (ciliated protozoan) ingests a poison, the poison inhibits the function of its contractile vacuoles.  This paramecium will a. Decrease in volume b. Increase in volume and may lyse c. Not change in volume d. Increase the number of contractile vacuoles

13.Cephalopods are able to swim for a sustained period Select one True False

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Please answer it soon   Which of the following is/are NOT true of torsion? result in a more compact body places the mantle cavity over the head involves shell and visceral mass coiling allows for larger bodys     Mollusc shell boring requires A. mechanical abrasion with a radula B. chemical softening C. shell-to-shell scraping D. None of the above E. A & B