1. INVERTEBRATE ZOOLOGY BIOLOGY 320 FALL 2005 COURSE INTRODUCTION

2. General Information Aaron L. Payette, M.S. Aaron L. Payette, M.S. WHI 177a WHI 177a 895-4918 895-4918 payettea@unlv.nevada.edu payettea@unlv.nevada.edu Office hours Office hours Tuesday, 10am – 11am Tuesday, 10am – 11am Also by appointment Also by appointment

3. Lecture – Tues and Thurs, 4pm – 5:15pm, here Lecture – Tues and Thurs, 4pm – 5:15pm, here Textbook – Ruppert, Fox and Barnes 7 th Edition Textbook – Ruppert, Fox and Barnes 7 th Edition Laboratory – Tuesday in FMA 110 Laboratory – Tuesday in FMA 110 Use side door Use side door Section 01 – 12:30pm – 3:20pm Section 01 – 12:30pm – 3:20pm Section 02 – 5:30pm – 8:20pm Section 02 – 5:30pm – 8:20pm Manual – Wallace and Taylor Manual – Wallace and Taylor Lab instructor – Marty Erwin Lab instructor – Marty Erwin 895-0807 895-0807 erwinm2@unlv.nevada.edu erwinm2@unlv.nevada.edu

4. Learning Objectives Understand the basics of common phyla Understand the basics of common phyla Protozoa, plus 19 out of roughly 35 animal phyla Protozoa, plus 19 out of roughly 35 animal phyla Taxonomy Taxonomy Important Phyla, Classes, Genera, and Species Important Phyla, Classes, Genera, and Species Anatomy and physiology Anatomy and physiology Interesting structures Interesting structures How body systems function How body systems function Links between form and function Links between form and function Evolution Evolution Adaptations Adaptations Evolutionary relationships Evolutionary relationships Ecology Ecology

5. Assessment Lecture Lecture 3 lecture exams 3 lecture exams Cumulative final exam Cumulative final exam 65% of total grade 65% of total grade Laboratory Laboratory 2 laboratory exams 2 laboratory exams Lab notebook Lab notebook Field trip or paper Field trip or paper 35% of total grade 35% of total grade

6. Tips for Succeeding in Lecture Read assigned chapters before attending lecture (do the same for lab) Read assigned chapters before attending lecture (do the same for lab) Study at least 10 hrs per week, from book and notes (similar but not exactly the same) Study at least 10 hrs per week, from book and notes (similar but not exactly the same) See me with specific questions See me with specific questions Tests are combination of multiple-choice and short answer / fill- in questions Tests are combination of multiple-choice and short answer / fill- in questions Test questions will be derived from both the book and lecture notes Test questions will be derived from both the book and lecture notes

7. Grading and “Will There Be a Curve?” Vote for preferred system Vote for preferred system Standard Standard A = 90% or above A = 90% or above B = 80% - 89% B = 80% - 89% C = 70% - 79% C = 70% - 79% Etc. Etc. No curve unless absolutely necessary No curve unless absolutely necessary No extra credit No extra credit Plus / Minus A = 93% or above A- = 90% - 92% B+ = 87% - 89% Etc.

8. Missed / Late Exam Policy No make-up exams, except with: No make-up exams, except with: Medical documentation Medical documentation Legal documentation Legal documentation Make-up exams will be essay form Make-up exams will be essay form If you arrive late to an exam, and even one exam has already been turned in, you will be given an essay test If you arrive late to an exam, and even one exam has already been turned in, you will be given an essay test

9. Miscellaneous Do NOT share information regarding laboratory exams with students in another section. This is cheating, and if you are caught sharing information, you will fail the course and possibly be expelled. Do NOT share information regarding laboratory exams with students in another section. This is cheating, and if you are caught sharing information, you will fail the course and possibly be expelled. Lecture and laboratory schedules are TENTATIVE Lecture and laboratory schedules are TENTATIVE

10. The Biological Sciences Biology – study of life Biology – study of life Many different fields (some examples) Many different fields (some examples) Zoology – study of animals Zoology – study of animals Anatomy – study of morphological structures Anatomy – study of morphological structures Physiology – study of how body structures (cells, organs, organ systems, etc) function Physiology – study of how body structures (cells, organs, organ systems, etc) function Evolution – study of change over time (molecular level to ecosystem level) Evolution – study of change over time (molecular level to ecosystem level) Ecology – study of how organisms interact and affect their environments, or vice versa Ecology – study of how organisms interact and affect their environments, or vice versa

11. Hierarchy of Life Atomic level to the biosphere level Atomic level to the biosphere level Figure covers molecular level to ecosystem level Figure covers molecular level to ecosystem level An ecologist may be a community ecologist, a population ecologist, etc. An ecologist may be a community ecologist, a population ecologist, etc.

12. Three Domains of Life Three large groups called domains Three large groups called domains Bacteria - prokaryotes Bacteria - prokaryotes Archaea - prokaryotes Archaea - prokaryotes Eukarya - eukaryotes Eukarya - eukaryotes Prokaryotic – cells lack a nucleus Prokaryotic – cells lack a nucleus Eukaryotic – cells possess a nucleus and membrane bound organelles Eukaryotic – cells possess a nucleus and membrane bound organelles

13. Classification is continually changing Classification is continually changing Some scientists don’t subscribe to the three domain method of classification Some scientists don’t subscribe to the three domain method of classification Some still use the Five Kingdom method Some still use the Five Kingdom method Domain Bacteria Domain Archaea

14. Domain Eukarya Domain Eukarya consists of several kingdoms Domain Eukarya consists of several kingdoms Protista - single celled (several kingdoms) Protista - single celled (several kingdoms) Plantae - multicellular Plantae - multicellular Fungi - multicellular Fungi - multicellular Animalia - multicellular Animalia - multicellular

15. Protists Kingdom PlantaeKingdom Animalia Kingdom Fungi

16. Diversity of Life DNA is the molecule responsible for diversity DNA is the molecule responsible for diversity Specific regions of DNA (genes) code for specific types of proteins Specific regions of DNA (genes) code for specific types of proteins Speciation occurs several ways Speciation occurs several ways Allopatric Allopatric Adaptive radiation Adaptive radiation Sympatric Sympatric If reproductive barriers arise between populations, speciation will occur If reproductive barriers arise between populations, speciation will occur Prezygotic barriers Prezygotic barriers Postzygotic barriers Postzygotic barriers

17. Evolution Origin of Species published by Charles Darwin in 1859 Origin of Species published by Charles Darwin in 1859 Concepts Concepts Descent with modification Descent with modification Natural selection – inherited traits within a species are selected for or against Natural selection – inherited traits within a species are selected for or against Adaptation – features that have evolved by means of natural selection Adaptation – features that have evolved by means of natural selection

18. Invertebrate Zoology Study of invertebrate animals Study of invertebrate animals Inverts make up at least 99% of all extant (living) animal species on the planet Inverts make up at least 99% of all extant (living) animal species on the planet Over 1,000,000 described spp. (species) on the planet (mostly insects) Over 1,000,000 described spp. (species) on the planet (mostly insects) Estimated 10 to 30 million spp. have yet to be described Estimated 10 to 30 million spp. have yet to be described We will cover 19 (time permitting) of the approx. 35 animal phyla We will cover 19 (time permitting) of the approx. 35 animal phyla

19. Preview of Phyla We Will Cover Protozoa – animal-like protists Protozoa – animal-like protists Do not belong to kingdom animalia, and thus are not considered to be invertebrate animals Do not belong to kingdom animalia, and thus are not considered to be invertebrate animals Important evolutionary link between prokaryotes, and everyday plants and animals Important evolutionary link between prokaryotes, and everyday plants and animals Volvox

20. Phylum Porifera Sponges Sponges

21. Phylum Cnidaria Jellyfish, Anemones, and Corals Jellyfish, Anemones, and Corals Portuguese Man O’ War

22. Phylum Ctenophora Comb Jellies Comb Jellies

23. Phylum Platyhelminthes Flatworms Flatworms

24. Phylum Nemertea Ribbon Worms Ribbon Worms

25. Phylum Mollusca Chitons, Clams, Snails, Slugs, Squids, and Octopi Chitons, Clams, Snails, Slugs, Squids, and Octopi Banana Slug

26. Phylum Annelida Segmented Worms Segmented Worms

27. Phylum Echiura Spoonworms Spoonworms

28. Phylum Sipuncula Peanut Worms Peanut Worms

29. Phylum Tardigrada Water Bears Water Bears

30. Phylum Arthropoda Horseshoe Crabs, Arachnids, Crustaceans, Myriapods, and Insects Horseshoe Crabs, Arachnids, Crustaceans, Myriapods, and Insects

31. Phylum Gastrotricha Name means “stomach hair” Name means “stomach hair”

32. Phylum Nematoda Roundworms Roundworms Caenorhabditis elegans = good Ascaris lumbricoides = bad

33. Phylum Rotifera Wheel bearers Wheel bearers

34. Phylum Phoronida A lophophorate A lophophorate

35. Phylum Brachiopoda Lamp shells, another lophophorate Lamp shells, another lophophorate

36. Phylum Bryozoa Bryozoans, the largest phylum in the superphylum Lophophorata Bryozoans, the largest phylum in the superphylum Lophophorata

37. Phylum Echinodermata Starfish, Brittle Stars, Urchins, and Sea Cucumbers Starfish, Brittle Stars, Urchins, and Sea Cucumbers

38. Phylum Chordata Phylum Chordata is the only phylum containing vertebrate animals, however, there are some invertebrate chordates Phylum Chordata is the only phylum containing vertebrate animals, however, there are some invertebrate chordates

39. Taxonomy Linnean system (Kingdom, Phylum, Class, Order, Family, Genus, Species) is almost abandoned Linnean system (Kingdom, Phylum, Class, Order, Family, Genus, Species) is almost abandoned Genus species (binomial nomenclature) is still used Genus species (binomial nomenclature) is still used Lumbricus terrestris Lumbricus terrestris Scientists are more interested in evolutionary relationships (how are organisms similar / different), as opposed to what “What class do shrimp belong to?” Scientists are more interested in evolutionary relationships (how are organisms similar / different), as opposed to what “What class do shrimp belong to?” Taxonomic names, and proposed evolutionary relationships change frequently Taxonomic names, and proposed evolutionary relationships change frequently

40. Cladistics Method embraced by the authors of your text for constructing evolutionary relationships in the form of phylogenetic trees, or cladograms Method embraced by the authors of your text for constructing evolutionary relationships in the form of phylogenetic trees, or cladograms May be assembled according to morphology and/or molecular data (nucleic acid or amino acid sequences) May be assembled according to morphology and/or molecular data (nucleic acid or amino acid sequences) Can be used to infer a great deal about evolutionary relationships Can be used to infer a great deal about evolutionary relationships But it is easy to make mistakes But it is easy to make mistakes Homology – good indication of a relationship Homology – good indication of a relationship Analogy - misleading Analogy - misleading

41. Morphological Vs. Molecular Data Body Plan DatarRNA Data

42. Ground Plan For each Phylum we cover, you want to understand that group’s ground plan (basic set of characteristics) For each Phylum we cover, you want to understand that group’s ground plan (basic set of characteristics) These characteristics are useful for determining differences / similarities between phyla These characteristics are useful for determining differences / similarities between phyla Ground plan for Phylum Arthropoda (example): segmented body, chitinous exoskeleton, periodic molts, and jointed appendages Ground plan for Phylum Arthropoda (example): segmented body, chitinous exoskeleton, periodic molts, and jointed appendages