PRESCOTT'S MICROBIOLOGY
11th Edition
ISBN: 2818440045677
Author: WILLEY
Publisher: MCG
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Chapter 24, Problem 3AL
Summary Introduction
A large group that includes Apicomplexa, Ciliophora, Dinoflagellata are called Alveolata. Apicomplexa is otherwise called as Apicomplexia. It is unicellular and endospore-forming. All the apicomplexans are either inter or intracellular
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50) Some protists, formerly united as the ʺamitochondriateʺ clade, have recently been shown to be rather diverse. Some of them possess neither mitochondria nor mitochondrial genes (and have been classified as fungi). Others possess no mitochondria, but do have mitochondrial genes in their nuclear genome. Still others have modified mitochondria (viz. mitosomes or hydrogenosomes). Which statement(s) represent(s) consequences of these recent findings? 1. The amitochondriates do not comprise a true clade. 2. The ʺamitochondriate hypothesisʺ concerning the root of the eukaryotic tree has been strengthened. 3. Just as there is a diversity of cyanobacterial descendants among eukaryotes, so too is there a diversity of alpha-proteobacterial descendants among the eukaryotes. 4. If the amitochondriate organisms continued to be recognized as a taxon, this taxon would be polyphyletic. 5. Horizontal gene transfer involving mitochondrial genes has occurred in some amitochondriate organisms. A) 1 only…
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Chapter 24 Solutions
PRESCOTT'S MICROBIOLOGY
Ch. 24.1 - Prob. 1CCCh. 24.1 - Prob. 2CCCh. 24.1 - Prob. 3CCCh. 24.1 - Prob. 4CCCh. 24.1 - Prob. 5CCCh. 24.1 - Describe vesicular, ovular, and chromosomal...Ch. 24.1 - Why has taxonomic classification of protists been...Ch. 24.2 - Prob. 1MICh. 24.2 - What are the functions of the stigma and the...Ch. 24.2 - Prob. 1CC
Ch. 24.2 - What is the function of the plasmalemma and...Ch. 24.2 - Prob. 3CCCh. 24.3 - Prob. 1MICh. 24.3 - Prob. 2MICh. 24.3 - Prob. 1CCCh. 24.3 - Prob. 2CCCh. 24.3 - Prob. 3CCCh. 24.4 - Prob. 1MICh. 24.4 - What are the functions of the micronucleus and...Ch. 24.4 - How does the trigger for sexual reproduction...Ch. 24.4 - Prob. 1CCCh. 24.4 - Compare how radiolaria use axopodia with the way...Ch. 24.4 - Prob. 3CCCh. 24.4 - Prob. 4CCCh. 24.4 - Describe conjugation as it occurs in ciliates....Ch. 24.4 - Prob. 6CCCh. 24.4 - Prob. 7CCCh. 24.4 - Prob. 8CCCh. 24.4 - Prob. 9CCCh. 24.5 - Prob. 1MICh. 24.5 - Compare the morphology of members of the genus...Ch. 24.5 - Prob. 2CCCh. 24 - Prob. 1RCCh. 24 - Prob. 2RCCh. 24 - Prob. 3RCCh. 24 - Prob. 4RCCh. 24 - Prob. 5RCCh. 24 - Prob. 6RCCh. 24 - Protist encystment is usually triggered by changes...Ch. 24 - Vaccine development for diseases caused by...Ch. 24 - Prob. 3ALCh. 24 - Benthic foraminifera inhabit marine sediments. It...Ch. 24 - Prob. 5AL
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- Give an example of a protist that is:(a) a parasite of humans(b) very large and photosynthetic(c) a unicellular species with two flagella and photosynthetic(d) covered in ciliaarrow_forwardWhat alga does a trypanosome superficially resemble?arrow_forwardProtists are(a) single-celled eukaryotes.(b) multicellular eukaryotes.(c) single-celled prokaryotes.(d) single-celled akaryote. Please try to break the solutions into as many steps as practically possible and the steps should come one by one and they should be short and crisp and plagiarism-free.arrow_forward
- In the pictures below, identify the arrowed reproductive structures of microscopic cyanobacteria based on the following descriptions: Akinetes are dormant structures larger than the vegetative cells, are rich in food reserves, and have thick walls. Most filamentous cyanobacteria develop akinetes in adverse conditions (e.g., winter, dry periods). When favorable conditions return, they germinate and produce new filaments. Hormogonia are short pieces of filaments consisting of 5–15 trichomes that fragment and develop into new filaments. Heterocytes (or heterocysts) are multicellular structures that have a thick and massive sheath, formed by members of the Nostocales. It is the location of the enzyme nitrogenase for nitrogen fixation, the conversion of nitrogen gas into ammonium and then amino acids. They may be intercalary or terminal in position and may germinate from either end or both the ends to give rise to new filaments. Non-filamentous cyanobacteria generally produce spores…arrow_forwardChloroplast formation in zygotes of algae?arrow_forwardProtists are a group of eukaryotic organisms that are brought together by scientists mostly by convenience. I) What is the relationship between all protists that ties them together? ii) provide an example of a autotrophic and heterotrophic protists group, iii) what is the relationship between the multicellular eukaryotes and the protists?arrow_forward
- What supergroup is Gracilaria in? Is this protist prokaryotic or eukaryotic?arrow_forwardWhich of the following processes are involved in thereproduction of protists ?(a) Binary fission and budding(b) Cell fusion and zygote formation(c) Spore formation and cyst formation(d) All of the above Please try to break the solutions into as many steps as practically possible and the steps should come one by one and they should be short and crisp and plagiarism-free.arrow_forwardSome non-plant organisms like the protist that spreads malaria contain a non-photosynthetic chloroplast called an apicoplast. Crazy! What best explains how protists have evolved apicoplasts?arrow_forward
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