Mycology and Algae Study Guide

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which of these characteristics is NOT a defining characteristic of fungi?

  • They are heterotrophic.
  • They are prokaryotic. (correct)
  • Their cell walls are made of chitin.
  • They are eukaryotic.

What is the primary function of the alga in a lichen?

  • To provide food for the lichen (correct)
  • To provide structural support for the lichen
  • To reproduce sexually for the lichen
  • To absorb water and nutrients for the lichen

Which of the following is NOT a characteristic of protozoa?

  • They are heterotrophic.
  • They are typically microscopic.
  • They are eukaryotic.
  • They are multicellular. (correct)

Which of the following phyla of fungi produces both conidia and ascospores?

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

What is the primary role of the fungus in a symbiotic relationship with an alga, forming a lichen?

<p>Providing structural support and protection (B)</p> Signup and view all the answers

Which of the following is a defining characteristic of parasitic helminths?

<p>Being multicellular and heterotrophic (D)</p> Signup and view all the answers

Which of the following correctly describes the mechanism of ascospore formation?

<p>Sexual reproduction, where spores are formed within a sac-like structure called an ascus. (D)</p> Signup and view all the answers

Which of these is NOT a characteristic of parasitic nematodes?

<p>They lack a distinct head. (C)</p> Signup and view all the answers

Which of the following is a characteristic of parasitic platyhelminths?

<p>They are always hermaphroditic. (D)</p> Signup and view all the answers

Which type of vector plays a role in transmitting a parasite by acting as an intermediate host?

<p>Biological vector (B)</p> Signup and view all the answers

What is the name of the structure that forms when buds do not separate from the mother cell?

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

Which of the following fungal phyla produces both ascospores and conidiospores?

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

What is the infective stage of Dirofilaria immitis for dogs and cats?

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

Which type of fungal infection affects keratin-containing tissues like hair, nails, and skin?

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

What is the definitive host for Enterobius?

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

Which disease can be transmitted by both ticks and mosquitoes?

<p>None of the above (D)</p> Signup and view all the answers

Which fungal phyla exhibit both septate hyphae and the production of basidiospores?

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

Which of the following is NOT a characteristic of fungi?

<p>They are prokaryotic (B)</p> Signup and view all the answers

What is the primary reason for the complex life cycle of parasitic helminths?

<p>To ensure the survival of the parasite. (A)</p> Signup and view all the answers

Which of the following describes the ecological relationship between the fungus and the alga in a lichen?

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

Which of these is NOT a feature that differentiates Taenia from Necator?

<p>Their reproductive cycle. (A)</p> Signup and view all the answers

What is the primary mode of reproduction for fungi?

<p>Both, depending on the species and environment (B)</p> Signup and view all the answers

Which type of fungal infection is commonly caused by fungi that are not usually pathogenic?

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

A patient presents with a fungal infection that has spread throughout their body. Which type of fungal infection would this be classified as?

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

Which organism is a common cause of urinary tract infections (UTIs)?

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

How do lichens contribute to soil formation?

<p>By breaking down rocks through chemical weathering, creating soil. (C)</p> Signup and view all the answers

What is the primary difference between cellular and plasmodial slime molds?

<p>Cellular slime molds exist as individual amoeboid cells, while plasmodial slime molds are multinucleate masses of protoplasm. (A)</p> Signup and view all the answers

Which of the following protozoan parasites is known to form protective cysts?

<p>Giardia lamblia (B)</p> Signup and view all the answers

Why is Trichomonas vaginalis a sexually transmitted infection?

<p>It requires intimate contact for transmission, making sexual contact the primary route. (D)</p> Signup and view all the answers

Which of these is NOT a characteristic shared by helminths?

<p>Complex digestive system (A)</p> Signup and view all the answers

How do nematodes reproduce?

<p>Sexually, with separate male and female individuals. (A)</p> Signup and view all the answers

Which of the following statements accurately describes the life cycle of a typical trematode (fluke)?

<p>Eggs laid by the adult fluke hatch into miracidia, which infect the first intermediate host, followed by the development of cercariae, which infect a second intermediate host before encysting and becoming metacercariae in the final host. (D)</p> Signup and view all the answers

Which of the following is TRUE about the roles of humans in the life cycles of tapeworms?

<p>Humans can serve as both the definitive host and the intermediate host for some tapeworm species. (A)</p> Signup and view all the answers

Which of the following statements describes the major difference between the roundworms (Nematodes) that infect humans with their eggs and those that infect with their larvae?

<p>The roundworms that infect humans with their eggs are typically found in the intestines, while those that infect with their larvae can migrate to other tissues. (A)</p> Signup and view all the answers

Which of these is NOT a defining characteristic of helminths?

<p>All are parasites of humans (A)</p> Signup and view all the answers

Which of the following is a defining characteristic of parasitic flatworms (Platyhelminthes)?

<p>They can be either monoecious or dioecious. (D)</p> Signup and view all the answers

What is the role of an intermediate host in the life cycle of a parasitic helminth?

<p>The intermediate host is where the helminth develops through one or more larval stages. (D)</p> Signup and view all the answers

What is the primary way to control or eliminate vector-borne diseases?

<p>Controlling or eradicating the vectors that spread the diseases. (C)</p> Signup and view all the answers

Which of the following statements accurately describes the role of arthropods as vectors in the transmission of diseases?

<p>Arthropods can transmit a variety of diseases, including viral, bacterial, and parasitic. (D)</p> Signup and view all the answers

Which type of algae is known for producing a neurotoxin harmful to humans?

<p>Diatoms (A), Dinoflagellates (D)</p> Signup and view all the answers

What is a defining characteristic that differentiates prokaryotes from protozoa?

<p>Presence of a nucleus (B)</p> Signup and view all the answers

Which of the following is NOT true of the archaezoan group of protozoa?

<p>They are all photosynthetic. (B)</p> Signup and view all the answers

What is the primary mode of reproduction for protozoa?

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

Which type of algae is most closely related to plants in terms of pigment composition?

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

Which type of slime mold exhibits a multinucleated, free-flowing mass of protoplasm?

<p>Plasmodial slime molds (D)</p> Signup and view all the answers

Which of these is NOT a role that algae play in the environment?

<p>Decomposers in soil and water (C)</p> Signup and view all the answers

What is the primary difference between amoebozoa and ciliophora?

<p>Mode of locomotion (A)</p> Signup and view all the answers

Flashcards

Defining characteristics of fungi

Fungi are eukaryotic organisms with chitin in their cell walls and obtain nutrients through absorption.

Asexual reproduction in fungi

Asexual reproduction in fungi often occurs through the production of spores like conidiospores.

Sexual reproduction in fungi

Sexual reproduction involves the fusion of male and female gametes leading to ascospore formation.

Characteristics of lichens

Lichens are symbiotic partnerships between fungi and algae, and they grow in harsh environments.

Signup and view all the flashcards

Defining characteristics of algae

Algae are photosynthetic eukaryotes with diverse forms and can be unicellular or multicellular.

Signup and view all the flashcards

Differences between protozoa and animals

Protozoa are single-celled eukaryotes, while animals are multicellular and have complex systems.

Signup and view all the flashcards

Intermediate vs. definitive host

The intermediate host harbors the larval stage of a parasite, while the definitive host harbors the adult stage.

Signup and view all the flashcards

Characteristics of parasitic helminths

Parasitic helminths are multicellular worms that depend on a host for nutrients and reproduction.

Signup and view all the flashcards

Helminth toxicity

Helminths can produce toxins harmful to their host.

Signup and view all the flashcards

Complicated life cycle of helminths

Many parasitic worms have complex life cycles, involving multiple hosts.

Signup and view all the flashcards

Platyhelminths characteristics

Flatworms are divided into two classes, with distinct features.

Signup and view all the flashcards

Paragonimus example

Paragonimus is a genus of lung flukes, a type of platyhelminth.

Signup and view all the flashcards

Dirofilaria immitis life stage

Infective larvae are the stage of Dirofilaria immitis that infect dogs and cats.

Signup and view all the flashcards

Arthropod vector types

Vectors transmitting parasites are categorized as mechanical, biological, or reservoir.

Signup and view all the flashcards

Tick vs mosquito

Ticks and mosquitoes are different vectors; they spread different diseases.

Signup and view all the flashcards

Mycology

The study of fungi, including their roles as decomposers and parasites.

Signup and view all the flashcards

Pseudohyphae

Buds that do not separate from the mother cell forming elongated structures.

Signup and view all the flashcards

Dimorphic fungi

Fungi that can exist as yeast at 37°C and mold at 25°C.

Signup and view all the flashcards

Sporangiospores

Asexual spores produced in sporangia by certain fungi.

Signup and view all the flashcards

Ascomycota

Fungi with septate hyphae that produce ascospores and often conidiospores.

Signup and view all the flashcards

Opportunistic mycoses

Fungal infections caused by non-pathogenic fungi that can infect susceptible individuals.

Signup and view all the flashcards

Lichens

A symbiotic relationship between an alga (or cyanobacterium) and a fungus.

Signup and view all the flashcards

Characteristics of algae

Eukaryotic organisms, often photoautotrophs, that can be unicellular or multicellular.

Signup and view all the flashcards

Cutaneous mycoses

Fungal infections affecting skin, nails, and hair containing keratin.

Signup and view all the flashcards

Asexual reproduction in algae

Algae reproduce asexually through cell division and fragmentation.

Signup and view all the flashcards

Sexual reproduction in algae

Many algae can also reproduce sexually.

Signup and view all the flashcards

Photoautotrophic algae

These algae produce oxygen through photosynthesis.

Signup and view all the flashcards

Diatoms

Unicellular algae with silica cell walls; some produce neurotoxins.

Signup and view all the flashcards

Dinoflagellates

Algae that produce neurotoxins causing shellfish poisoning.

Signup and view all the flashcards

Roles of algae

Algae are primary producers in aquatic food chains.

Signup and view all the flashcards

Protozoa characteristics

Protozoa are unicellular, eukaryotic chemoheterotrophs found in diverse environments.

Signup and view all the flashcards

Ciliates reproduction

Ciliates reproduce sexually by conjugation, leading to zygote formation.

Signup and view all the flashcards

Phylum Platyhelminthes

Phylum that includes parasitic flatworms, like flukes and tapeworms.

Signup and view all the flashcards

Phylum Nematoda

Phylum that includes parasitic roundworms, such as pinworms and hookworms.

Signup and view all the flashcards

Helminth life cycle

The life cycle of helminths typically includes adult and larval stages, requiring hosts.

Signup and view all the flashcards

Monoecious vs Dioecious

Monoecious organisms have both sex organs, while dioecious have separate sexes.

Signup and view all the flashcards

Dorsoventrally flattened

Flatworms have bodies that are flattened top to bottom.

Signup and view all the flashcards

Cestode structure

Cestodes, or tapeworms, have a head (scolex) and segments (proglottids).

Signup and view all the flashcards

Definitive host

The host in which the adult parasitic helminth lives and reproduces.

Signup and view all the flashcards

Intermediate host

The host where larval stages of helminths develop before reaching adults.

Signup and view all the flashcards

Role of lichens in soil formation

Lichens are the first colonizers on bare rock, aiding in soil creation through chemical weathering.

Signup and view all the flashcards

Cellular slime molds

Cellular slime molds exist as individual amoeboid cells but form spores in adverse conditions.

Signup and view all the flashcards

Plasmodial slime molds

Plasmodial slime molds are multinucleate masses of protoplasm that also form spores under stress.

Signup and view all the flashcards

Trichomonas survival

Trichomonas cannot survive long outside a host due to lack of protective cysts.

Signup and view all the flashcards

Ingestion in protozoa

Ingestion is the primary method for protozoa to acquire nutrients.

Signup and view all the flashcards

Phylum of flatworms

Flatworms belong to the Phylum Platyhelminthes.

Signup and view all the flashcards

Trematodes classification

Trematodes are a class of flatworms within the Phylum Platyhelminthes, known as flukes.

Signup and view all the flashcards

Reproductive organs in helminths

In some helminths, male and female reproductive organs are in separate individuals.

Signup and view all the flashcards

Study Notes

Fungi

  • Mycology is the study of fungi
  • Fungi are primarily aerobic or facultatively anaerobic chemoheterotrophs
  • Most fungi are decomposers; some are parasites of plants and animals
  • Fungal thallus consists of hyphae; a mass of hyphae is called a mycelium
  • Yeasts are unicellular fungi that reproduce by fission (symmetrical division) or budding (asymmetrical division)
  • Pathogenic dimorphic fungi are yeast-like at 37°C and mold-like at 25°C
  • Fungi are categorized based on rRNA
  • Asexual reproduction involves sporangiospores and conidiospores
  • Sexual reproduction occurs in response to specific conditions
  • Fungi can thrive in acidic, low-moisture, and aerobic environments
  • Fungal metabolism includes the breakdown of complex carbohydrates

Algae

  • Algae are unicellular, filamentous, or multicellular
  • Algae primarily live in aquatic environments
  • Algae are eukaryotic and predominantly photoautotrophic
  • Multicellular algae have stipe, holdfast, and blades
  • Algae reproduce asexually via cell division or fragmentation
  • Algae reproduce sexually in many cases
  • Photoautotrophic algae produce oxygen
  • Algae are categorized by structure and pigments

Lichens

  • Lichens are a mutualistic combination of an alga (or cyanobacterium) and a fungus
  • Algal component photosynthesizes, providing carbohydrates to the lichen
  • Fungal component provides a holdfast for the lichen
  • Lichens can colonize inhospitable or unsuitable habitats
  • Lichens can be classified morphologically as crustose, foliose, or fruticose

Protozoa

  • Protozoa are unicellular, eukaryotic chemoheterotrophs
  • Protozoa are found in soil, water and as normal microbiota in animals
  • Vegetative form is called a trophozoite
  • Asexual reproduction involves fission, budding, or schizogony
  • Some protozoa form cysts that provide protection during adverse conditions
  • Protozoa have complex cells with a pellicle, cytostome (mouth), and anal pore
  • Protozoa are categorized based on flagella, no flagella (amoeba) etc.

Slime Molds

  • Cellular slime molds resemble amoebas, ingesting bacteria by phagocytosis
  • Plasmodial slime molds are a multinucleated mass of protoplasm that engulfs organic debris and bacteria as it moves

Helminths

  • Helminths are multicellular animals, some of which are parasites of humans
  • Helminth anatomy and life cycle are modified for parasitism
  • Adults are found in definitive hosts
  • Larval development requires intermediate hosts
  • Helminths can be monoecious (one sex) or dioecious (two sexes)
  • Parasitic flatworms (Platyhelminthes): dorsoventrally flattened; may lack a digestive system
  • Parasitic roundworms (Nematodes): complete digestive system

Arthropods

  • Arthropods are jointed-legged animals; some are vectors (animals that carry diseases)

Additional notes

  • Vectorborne diseases are effectively eliminated by controlling or eradicating vectors

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

Chapter 12 Study Guide PDF

More Like This

Use Quizgecko on...
Browser
Browser