Taxonomy Study Guide Quiz

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Questions and Answers

What is the unique characteristic of the cell wall of Diatoms?

  • Made of calcium carbonate
  • Made of silica (correct)
  • Made of chitin
  • Made of cellulose

Which of the following is NOT a characteristic of flagellates?

  • Possess one or more flagella for movement
  • Can be found in various aquatic environments
  • Often have a protective pellicle or jelly-like coating
  • Typically form symbiotic relationships with fungi (correct)

Which of the following diseases is caused by a protist and can be spread through sexual contact?

  • Toxoplasmosis
  • Giardiasis
  • Tricomotus (correct)
  • African Sleeping Sickness

How do amoebas primarily move?

<p>By using pseudopods (A)</p> Signup and view all the answers

What is the primary way fungi digest food?

<p>By secreting enzymes that break down food outside their bodies. (A)</p> Signup and view all the answers

Which of the following is NOT a benefit of lichens?

<p>They decompose organic matter. (A)</p> Signup and view all the answers

Which of the following is a characteristic of Euglena that makes it more similar to plants?

<p>They are autotrophic (A)</p> Signup and view all the answers

What is the primary role of plankton in the aquatic ecosystem?

<p>To provide food for larger organisms (A)</p> Signup and view all the answers

What is the main structural component of fungal cell walls?

<p>Chitin (C)</p> Signup and view all the answers

Which of the following diseases is NOT caused by a protist?

<p>Chagas disease (D)</p> Signup and view all the answers

Which of the following is NOT a characteristic of bacteria?

<p>Have a cell wall made of peptidoglycan (B)</p> Signup and view all the answers

Which of the following is NOT a characteristic of protists?

<p>Are always microscopic organisms (D)</p> Signup and view all the answers

Which of the following statements about fungi is FALSE?

<p>They are primarily autotrophic, like plants. (A)</p> Signup and view all the answers

Which of the following is NOT a type of protozoan based on its mode of movement?

<p>Flagellate (A)</p> Signup and view all the answers

What type of cell wall is found in bacteria?

<p>Peptidoglycan (D)</p> Signup and view all the answers

What is the primary role of mycelium in fungi?

<p>It is the main body of the fungus. (D)</p> Signup and view all the answers

Which taxonomic category is the most specific?

<p>Species (D)</p> Signup and view all the answers

What is the correct format for writing a species name in binomial nomenclature?

<p>Genus capitalized and species in lowercase, both italicized (D)</p> Signup and view all the answers

Which kingdom is characterized as prokaryotic and single-celled?

<p>Eubacteria (A)</p> Signup and view all the answers

Which characteristic does NOT describe a virus?

<p>Alive and capable of metabolism (C)</p> Signup and view all the answers

Which of the following characteristics is derived?

<p>A trait evolved in a specific lineage not found in ancestral species (A)</p> Signup and view all the answers

Which domain is most closely related to Eukarya?

<p>Archaea (A)</p> Signup and view all the answers

What represents a common ancestor in a cladogram?

<p>Internode point (B)</p> Signup and view all the answers

Which of the following statements about bacteria is true?

<p>They have cell walls. (B)</p> Signup and view all the answers

What occurs during the lytic cycle of a bacteriophage?

<p>The virus enters and starts replicating immediately. (A)</p> Signup and view all the answers

Which characteristic differentiates bacteria from bacteriophages?

<p>Bacteria can replicate independently. (D)</p> Signup and view all the answers

What is a defining feature of a lysogenic cycle?

<p>Incorporates into the host genome and remains dormant. (A)</p> Signup and view all the answers

Which shape does a bacillus bacterium take?

<p>Rod (A)</p> Signup and view all the answers

How do bacteria primarily replicate?

<p>By binary fission and budding. (A)</p> Signup and view all the answers

What aids in the process of transduction in bacteria?

<p>Bacteriophages. (A)</p> Signup and view all the answers

Which of the following statements about viruses is true?

<p>They require a host to replicate. (C)</p> Signup and view all the answers

Which statement about the structures of bacteria is accurate?

<p>Bacteria have peptidoglycan in their cell walls. (A)</p> Signup and view all the answers

What characteristic distinguishes gram-positive bacteria from gram-negative bacteria?

<p>They contain peptidoglycan in a thicker layer. (A)</p> Signup and view all the answers

Which type of protist moves using pseudopods?

<p>Amoeba (A)</p> Signup and view all the answers

What is a method by which bacteria can exchange genetic material?

<p>Conjugation (C)</p> Signup and view all the answers

Which characteristic is true regarding euglena?

<p>They can photosynthesize. (C)</p> Signup and view all the answers

Which of the following best describes the structure of gram-negative bacteria?

<p>A double phospholipid membrane with an outer layer. (B)</p> Signup and view all the answers

What forms the basis for most protists' classification?

<p>Method of locomotion. (C)</p> Signup and view all the answers

What is the role of nitrogen fixation in bacteria?

<p>To convert nitrogen into a usable form for plants. (D)</p> Signup and view all the answers

Which of the following protists is classified as a heterotroph?

<p>Amoeba (A)</p> Signup and view all the answers

Flashcards

Taxonomic Categories

The hierarchical system of classification in biology, from domain to species.

Binomial Nomenclature

The two-part naming system for species, using genus and species names in Latin.

Derived Characteristics

Traits that have evolved in a lineage, absent in ancestral species.

Cladograms

Diagrams that show evolutionary relationships and common ancestors.

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Eubacteria

A domain of prokaryotic, single-celled organisms, common bacteria.

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Archaea

A domain of single-celled prokaryotes with distinct biochemistry, more related to eukarya.

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Eukarya

The domain encompassing all eukaryotic organisms, can be multicellular or single-celled.

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Difference between Virus and Bacteria

Viruses are non-living, require hosts, and are smaller than bacteria.

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Lytic Cycle

A viral replication process that quickly infects host cells and causes them to burst.

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Lysogenic Cycle

A viral replication process where the virus remains dormant in the host until it becomes lytic.

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Bacteriophage

A type of virus that specifically infects bacteria.

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Binary Fission

The method by which bacteria replicate, splitting into two cells.

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Coccus

A spherical shape of bacteria.

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Bacillus

A rod-shaped form of bacteria.

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Spirillum

A spiral-shaped bacteria.

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Peptidoglycan

A substance forming the cell wall of many bacteria, providing structural support.

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Dysentery (Amoebic)

An infection caused by amoeba in contaminated water or food.

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Toxoplasmosis

A disease dangerous to fetuses, potentially causing severe birth complications.

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Giardiasis

An illness from contaminated water causing fatigue and diarrhea.

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Lichen

A symbiotic relationship between fungi and algae, aiding in habitat recovery.

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Fungal Digestion

Fungi decompose food using external enzymes and their mycelium.

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Importance of Fungi

Fungi decompose matter and are used for antibiotics and brewing.

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Cell Walls of Organisms

Bacteria have peptidoglycan, protists have cellulose/silica, fungi have chitin.

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Fungal Infections in Humans

Fungi often infect skin and body surfaces, causing conditions like athlete's foot.

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Prokaryotic

Organisms without a nucleus, like bacteria.

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Peptidoglycan Wall

A rigid structure in bacterial cell walls, providing shape and protection.

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Gram-Positive Bacteria

Bacteria with a thick peptidoglycan wall that stains purple or blue.

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Gram-Negative Bacteria

Bacteria with a thin wall and an outer membrane, stains red or pink.

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Conjugation

A process where two bacteria exchange DNA via pili connection.

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Euglena

A type of protist that can photosynthesize and moves by flagella.

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Amoeba

A protist that moves using pseudopods and is heterotrophic.

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Nucleic Acid Shape in Bacteria

Nucleic acid in bacteria is typically circular and found in the nucleoid region.

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Diatoms

Diatoms are photosynthetic protists with silica cell walls, found in freshwater and marine environments.

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Flagellates

Flagellates are organisms with one or more flagella, often with a jelly-like coating.

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Algae's Role in Oxygen Production

Algae produce the majority of Earth's oxygen and can form symbiotic relationships with fungi (lichens).

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Classification of Protozoans

Protozoans are classified by their movement; types include amoeba (pseudopods), paramecium (cilia), and euglena (flagella).

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Movement of Paramecium

Paramecium moves using cilia and has a gullet for digestion, making it unique among protozoans.

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Movement of Amoeba

Amoeba moves by extending its cytoplasm into pseudopods, projecting like arms.

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Plankton

Plankton are microscopic eukaryotic organisms in water that serve as food for larger organisms.

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Study Notes

Taxonomy Study Guide

  • Taxonomic Categories (least to most specific): Domain, Kingdom, Phylum/Division (in plants), Class, Order, Family, Genus, Species
  • Binomial Nomenclature: Latin language. Capitalize the genus, lowercase the species, and italicize both.
  • Binomial Nomenclature Components: Includes the genus and species
  • Kingdoms in Taxonomy: Eubacteria, Archaebacteria, Plantae, Animalia, Protista, Fungi.
  • Derived Characteristics: A trait that evolved in a lineage, absent in the ancestral species.
  • Cladograms: Common ancestors are where the internodes connect. Use cladograms to identify common ancestors and closely related organisms.
  • Domains:
  • Eubacteria: Prokaryotic, single-celled, diverse
  • Archaea: Prokaryotic, single-celled, some similar life processes to eukaryotes, distinct chemical makeup.
  • Eukarya: Eukaryotic, range from single-celled organisms to complex multicellular ones, widest range of diversity
  • Viruses: Not living, smaller than bacteria, have DNA/RNA core, replicate inside a host cell.
  • Lytic Cycle: Virus enters, replicates, immediately explodes the host cell.
  • Lysogenic Cycle: Virus enters, stays dormant until triggering a lytic cycle, virus incorporates into host's genome.
  • Bacteria Shapes: Coccus (sphere), Bacillus (rod), Spirillum (spiral)
  • Bacteria Structure: Prokaryotic, cell wall (peptidoglycan), circular DNA, no nucleus
  • Protists: Eukaryotic, diverse, classified by how they move (pseudopods, cilia, flagella). Include Amoeba (pseudopods), Paramecium (cilia), Euglena (flagella)
  • Gram-Positive vs. Gram-Negative Bacteria: Gram-positive have thicker cell walls, gram-negative have additional membranes. (significant medical implications.)
  • Conjugation: Bacterial process involving exchange of genetic material.
  • Bacteria Nucleic Acid Shape: Circular DNA
  • Diatoms: Photosynthetic protists, found in freshwater and marine environments. Cell walls composed of silica.
  • Algae (related to protists): Primary oxygen producers on Earth, some form symbiotic relationships with fungi (lichen)
  • Flagellates (protists): Single-celled organisms with one or more whip-like appendages (flagella)
  • Plankton: Microscopic eukaryotes in water, crucial for food webs
  • Fungi: Decomposers, form symbiotic relationships with algae to create lichens, some are pathogenic to humans. Characteristics include cell walls made of chitin.
  • Fungal Diseases: Skin and body surface infections, like Athlete's foot, ringworm

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