Lab 4 Pre-lab assignment- Shubh

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University of Ontario Institute of Technology *

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1010

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Biology

Date

Dec 6, 2023

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docx

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5

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LAB 4 PRE-LAB ASSIGNMENT ANIMAL DIVERSITY NAME: Shubh Chand ID #: 100864979 CRN: 70008 LAB 4 PRE-LAB ASSIGNMENT is due ANY TIME BEFORE the start of your lab! YOU NEED TO COMPLETE THE PRE-LAB ASSIGNMENT AND SEND AN ELECTRONIC COPY through the assignment submission on Canvas BEFORE the start of the lab. Submissions after the start of the lab are not going to be accepted and will receive a ZERO for the preparation of the lab!!!! Late submissions will not be accepted. It is recommended that you work on the pre-lab well before the due date and submit the pre-lab at least 1 hour before the start of the lab to ensure that you do not encounter any technical issues. Do not leave it until the last minute. You need to upload a pdf, doc or docx file as an assignment submission in Canvas. Here are the steps to upload a file as an assignment submission in Canvas. To upload: 1. Open Assignments. In Course Navigation, click the Assignments link (or go directly to BIOL 1020 lab folder and access the appropriate assignment from this folder). 2. Select the assignment. Click the title of the assignment. 3. Submit Assignment. Click the Submit Assignment button. 4. Add File. ... 5. View Submission. Check submission is complete and correct. NOTE: use the space provided in the boxes below to answer the questions. Please do not write outside of the boxes and do not modify the box sizes, as your answers will NOT be graded out of this range. Try to be concise and specific with your answers and complete the assignment in your own words. **Utilize the necessary online resources for your research but please answer questions in your own words!** BIOL1020 Pre-lab Assignment 4 1
EXERCISE 4.1: Anatomy of a Freshwater Mussel 1. Answer the following questions about mussels. (a) What is the role of the mantle? (b) What is the role of the muscular foot? (c) What are the functions of the incurrent (ventral) and excurrent (dorsal) siphons? (d) What is the haemocoel? (e) Describe the composition of a bivalve shell. bivalve shells consist of three layers: 1. The nacreous layer - the smooth iridescent inner layer of the shell and is composed of alternating layers of calcium carbonate and organic matter 2. The prismatic layer - the thickest, middle layer which is made of a mix of calcium carbonate and organic materials 3. The periostracum - the outer layer, which is made primarily of protein. The mantle secretes proteins and minerals to form the shell. The muscular foot is used to anchor the mussel or to allow movement through the underlying substance. Water enters through the incurrent siphon, circulates within the mussel, and is expelled through the excurrent siphon. The haemocoel is the primary body cavity in mussels, which contains circulatory fluid. BIOL1020 Pre-lab Assignment 4 2
EXERCISE 4.2: Anatomy of a Fish 1 (a) How many chambers are present in a fish heart? 1 (b) What is the function of the lateral line? (c) In ray-finned fishes, the swim bladder is a modification of what structure? Explain how fish use their swim bladder to regulate buoyancy. EXERCISE 4.3: Anatomy of a Crayfish 1. Answer the following questions about arthropods. (a) How do crayfish excrete waste? (b) Crayfish belong to the group Ecdysozoa. What is the one major characteristic that is unique to this group? (c) What three characteristics of arthropods have contributed to their success? 1. Segmentation The lateral line aims to detect movements and pressure changes in the surrounding water. Fish will fill their swim bladders with air to rise or release air from the swim bladder to sink. Crayfish can excrete wastes through blood circulation. All members share the characteristic of ecdysis. BIOL1020 Pre-lab Assignment 4 3
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