Diversity I lab - Diversity of Protists

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Reading Assignment & Pre-Lab – Diversity I Lab – Diversity of Protists Read the following sections of your Campbell Biology textbook. Your goal for reading should be to develop a familiarity with: >> Terminology relevant to the evolutionary history and diversity of these taxa The main taxonomic groups you will encounter in lab > The structures that define these groups These are the types of things you'll need to know for your lecture exams, so this lab and pre-lab are designed to support your learning in lecture. Learn it well here, and you'll save time when studying for your next exam. Ch 28, Key concept 28.1 - Most eukaryotes are single-celled organisms (including Figure 28.2) ► You will observe living examples of many protist taxa in this week's lab. ► Read the remaining sections of the Chapter 28 and record (handwritten in your notebook) the following information for each of the following taxa: (1) their physical and defining characteristics, (2) their importance, and (3) AT LEAST one example of each taxon. [It may help to record this information in a table rather than using bullets or paragraphs.] Recognize that your textbook and the following list reflect one current hypothesis on eukaryote phylogeny that puts them in 4 supergroups. Our understanding of their evolutionary relationships is changing rapidly and likely to change over time. Excavata → Diplomonads → Parabasalids → Euglenozoans • Kinetoplastids • Euglenids to The “SAR" clade → Stramenopiles • Diatoms • Golden algae Brown algae ► Alveolates • Dinoflagellates • Apicomplexans • Ciliates → Rhizarians • Radiolarians • Forams . Cercozoans Archaeplastida → Red algae → Green algae 124 Unikonta ܀ VETRY TO → Amoebozoans • Slime molds • Tubulinids • Entamoebas → Opisthokonts (also see related sections of Chs. 31 & 32] Nuclearids (also see Key Concept 31.3] • Choanoflagellates (also see Key Concept 32.2] bold
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Running head: DIVERSITUY OF PROTF

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Diversity of Protists
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DIVERSITUY OF PROTF

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Excavate
Diplomonads
It is a parasite living in animals. It is small with about 15µm. It has two haploid nuclei
making look like a face. It has no mitochondria are capable of fermenting sugar to produce
energy. They do not have lysosomes and peroxisomes. They inhibit the digestive system of
animals. They feed through digestion and absorption. This taxon causes a significant health issue
such as diarrhea. An example of diplomonad includes Giardia lamblia.
Parabasalid
They are arranged near the cell interior. They are single-celled without mitochondria.
They also lack peroxisomes. However, they have specialized organelles. They bread through
mitosis. They have a nuclear envelope and extra-nuclear spindle. Their significance is to cause
sexually transmitted disease in the human body. An example of Parabasalid include Trichomonas
Vaginalis
Euglenozoans
They are paddle-shaped with discoidal mitochondrial cristae. Have closed mitosis and has
an intranuclear spindle. Kinetoplastids have a clump that has DNA referred to as the kinetoplast.
Euglenids have plasma membrane on their cell service. This membrane is known as the pellicle.
Kinetoplastids are widespread. Have mitochondria DNA its size may be from 10-100 microns
and below 20 microns in width. They have the paraflagellar rod. They have a Golgi apparatus.
They include the trypanosomatids. Eugenides are free-living. There are more than one thousand
species of euglenids. They have paddle-shaped mitochondria, Golgi bodies, flagellar appa...


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