INTEG.PRIN.OF ZOOLOGY-EBOOK CODE
INTEG.PRIN.OF ZOOLOGY-EBOOK CODE
18th Edition
ISBN: 9781260914894
Author: HICKMAN
Publisher: MCG
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Chapter 19, Problem 1RQ
Summary Introduction

To discuss: The important distinguishing features of arthropods.

Introduction: Arthropods are the protostomes and belong to the ecdysozoan branch. More than ¾ of all known species belong to this group. Arthropods have specific features that allow them to inhabit a wide range of habitat.

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Arthropods are bilaterally symmetrical, triploblastic organisms with an organ system level of body plan. They have a complete digestive tube. Presence of a segmented body, a hard exoskeleton composed of chitin and protein, and the paired jointed appendages are the characteristic features of arthropods. The appendages are modified for various functions such as swimming paddles, walking legs, mouthparts, and sensory organs.

The nervous system consists of a brain and ventral nerve cord with ganglia. Some arthropods such as insects and many crustaceans have compound eyes composed of many light-sensitive units called ommatidia. Arthropods have an open circulatory system and a dorsal, tubular heart. Arthropods have gills, tracheae, or book lungs for breathing. They have a complete digestive system. Different classes of arthropods have various excretory structures. For example, two or more malpighian tubules receive metabolic wastes from the blood in insects and serve as structures of excretion.

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For short answer questions, write your answers on the line provided. To the right is the mRNA codon table to use as needed throughout the exam. First letter U บบบ U CA UUCPhe UUA UCU Phe UCC UUG Leu CUU UAU. G U UAC TV UGCys UAA Stop UGA Stop A UAG Stop UGG Trp Ser UCA UCG CCU] 0 CUC CUA CCC CAC CAU His CGU CGC Leu Pro CCA CAA Gin CGA Arg CUG CCG CAG CGG AUU ACU AAU T AUC lle A 1 ACC Thr AUA ACA AUG Mot ACG AGG Arg GUU GCU GUC GCC G Val Ala GAC Asp GGU GGC GUA GUG GCA GCG GAA GGA Gly Glu GAGJ GGG AACASH AGU Ser AAA1 AAG Lys GAU AGA CAL CALUCAO CAO G Third letter 1. (+7) Use the table below to answer the questions; use the codon table above to assist you. The promoter sequence of DNA is on the LEFT. You do not need to fill in the entire table. Assume we are in the middle of a gene sequence (no need to find a start codon). DNA 1 DNA 2 mRNA tRNA Polypeptide C Val G C. T A C a. On which strand of DNA is the template strand (DNA 1 or 2)?_ b. On which side of the mRNA is the 5' end (left or…
3. (6 pts) Fill in the boxes according to the directions on the right. Structure R-C R-COOH OH R-OH i R-CO-R' R R-PO4 R-CH3 C. 0 R' R-O-P-OH 1 OH H R-C-H R-N' I- H H R-NH₂ \H Name Properties
4. (6 pts) Use the molecule below to answer these questions and identify the side chains and ends. Please use tidy boxes to indicate parts and write the letter labels within that box. a. How many monomer subunits are shown? b. Box a Polar but non-ionizable side chain and label P c. Box a Basic Polar side chain and label BP d. Box the carboxyl group at the end of the polypeptide and label with letter C (C-terminus) H H OHHO H H 0 HHO H-N-CC-N-C-C N-C-C-N-GC-OH I H-C-H CH2 CH2 CH2 H3C-C+H CH2 CH2 OH CH CH₂ C=O OH CH2 NH2
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