Kingdom Fungi Notes for NEET | Easy Biology Revision

  NEET Biology: Kingdom Fungi Complete Short Notes

“Kingdom Fungi: Structure, hyphae network, and major fungal types shown in a NEET-friendly biology diagram.”

- Dr.Sanjaykumar Pawar 

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KINGDOM FUNGI – EASY NOTES FOR NEET

1. Introduction

• Fungi form a separate kingdom of heterotrophic organisms.
• They show very diverse shapes and habitats.
• Common examples you see in daily life:
  • Bread mould on moist bread
  • Rotten fruits
  • Mushrooms and toadstools
• White patches on mustard leaves are caused by fungi.

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2. Importance of Fungi

• Some fungi are useful:
  • Yeast → used in bread making and beer production
  • Penicillium → produces antibiotics
• Some fungi are harmful:
  • Cause diseases in plants and animals
  • Example: Wheat rust (Puccinia)
• Fungi are found:
  • In air, water, soil, plants, animals
• They grow best in:
  • Warm and humid places
• Food is kept in refrigerator to prevent fungal spoilage.

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3. Body Structure of Fungi

• Except yeast, fungi are filamentous (thread-like).
• Their body is made of:
  • Hyphae → long thread-like structures
  • Mycelium → network of hyphae
• Types of hyphae:
  • Coenocytic hyphae → no cross walls, multinucleated
  • Septate hyphae → have cross walls (septa)
• Cell wall of fungi is made of:
  • Chitin + polysaccharides

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4. Nutrition in Fungi

• Fungi are heterotrophic (cannot make food).
• Types of nutrition:
  • Saprophytes → feed on dead matter
  • Parasites → live on living organisms and harm them
  • Symbionts → live in association
    • Lichens → algae + fungi
    • Mycorrhiza → fungi + plant roots

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5. Reproduction in Fungi

(A) Vegetative reproduction

• By:
  • Fragmentation
  • Fission
  • Budding

(B) Asexual reproduction

• By spores:
  • Conidia
  • Sporangiospores
  • Zoospores

(C) Sexual reproduction

• By spores:
  • Oospores
  • Ascospores
  • Basidiospores

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6. Sexual Cycle in Fungi (VERY IMPORTANT)

Three main steps:

1. Plasmogamy → fusion of cytoplasm
2. Karyogamy → fusion of nuclei
3. Meiosis → formation of haploid spores

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7. Special Feature – Dikaryotic Stage

• In some fungi:
  • Two nuclei exist in one cell (n + n condition)
• This stage is called:
  • Dikaryon (dikaryotic phase)
• Later:
  • nuclei fuse → diploid stage (2n)

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8. Classification of Fungi (Main Groups)

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8.1 PHYCOMYCETES

• Found in:
  • Water
  • Moist places
  • Decaying wood
• Mycelium:
  • Aseptate and coenocytic
• Asexual reproduction:
  • Zoospores (motile)
  • Aplanospores (non-motile)
• Sexual reproduction:
  • Zygospore formation
• Examples:
  • Mucor
  • Rhizopus (bread mould)
  • Albugo (mustard parasite)

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8.2 ASCOMYCETES (SAC FUNGI)

• Mostly multicellular, some unicellular (yeast)
• Habitat:
  • Saprophytes
  • Parasites
  • Decomposers
  • Coprophilous (grow on dung)
• Mycelium:
  • Branched and septate
• Asexual spores:
  • Conidia (exogenous formation)
• Sexual spores:
  • Ascospores (endogenous in asci)
• Fruit body:
  • Ascocarp
• Examples:
  • Aspergillus
  • Claviceps
  • Neurospora (genetics studies)
  • Edible: morels, truffles

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8.3 BASIDIOMYCETES

• Examples:
  • Mushrooms
  • Puffballs
  • Bracket fungi
• Habitat:
  • Soil, wood, trees
• Mycelium:
  • Branched and septate
• Asexual spores:
  • Generally absent
• Sexual reproduction:
  • Dikaryotic stage present
• Spores:
  • Basidiospores (formed on basidium)
• Fruit body:
  • Basidiocarp
• Examples:
  • Agaricus (mushroom)
  • Puccinia (rust)
  • Ustilago (smut)

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8.4 DEUTEROMYCETES (IMPERFECT FUNGI)

• Called imperfect fungi
• Reason:
  • Only asexual stage known
• Sexual stage discovered later → moved to other groups
• Reproduction:
  • Only by conidia
• Mycelium:
  • Septate and branched
• Role:
  • Decomposers
  • Help in mineral cycling
• Examples:
  • Alternaria
  • Colletotrichum
  • Trichoderma

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QUICK REVISION (VERY IMPORTANT)

• Fungi = heterotrophic + chitin cell wall
• Body = hyphae + mycelium
• Nutrition = saprophyte / parasite / symbiont
• Reproduction = vegetative + asexual + sexual
• Key groups = Phycomycetes, Ascomycetes, Basidiomycetes, Deuteromycetes

KINGDOM FUNGI

│

├── General Characteristics

│   ├── Heterotrophic organisms

│   ├── Diverse morphology and habitats

│   ├── Cosmopolitan distribution

│   │   ├── Air

│   │   ├── Water

│   │   ├── Soil

│   │   └── On plants & animals

│   ├── Prefer warm and humid places

│   ├── Examples

│   │   ├── Mushrooms

│   │   ├── Toadstools

│   │   ├── Bread mould (Rhizopus)

│   │   ├── Yeast (unicellular fungi)

│   │   ├── Puccinia (wheat rust)

│   │   └── Penicillium (antibiotics)

│

├── Body Structure

│   ├── Except yeast → multicellular and filamentous

│   ├── Hyphae (thread-like structures)

│   ├── Mycelium (network of hyphae)

│   ├── Types of hyphae

│   │   ├── Coenocytic (multinucleate, no septa)

│   │   └── Septate (with cross walls)

│   └── Cell wall composition

│       ├── Chitin

│       └── Polysaccharides

│

├── Nutrition

│   ├── Saprophytic (dead organic matter)

│   ├── Parasitic (living hosts)

│   └── Symbiotic

│       ├── Lichens (fungi + algae)

│       └── Mycorrhiza (fungi + roots of plants)

│

├── Reproduction

│   ├── Vegetative

│   │   ├── Fragmentation

│   │   ├── Fission

│   │   └── Budding

│   │

│   ├── Asexual reproduction

│   │   ├── Spores

│   │   │   ├── Conidia

│   │   │   ├── Sporangiospores

│   │   │   └── Zoospores

│   │   └── Fruiting bodies

│   │

│   ├── Sexual reproduction

│   │   ├── Oospores

│   │   ├── Ascospores

│   │   ├── Basidiospores

│   │   └── Process

│   │       ├── Plasmogamy (cytoplasm fusion)

│   │       ├── Karyogamy (nuclear fusion)

│   │       └── Meiosis → haploid spores

│   │

│   └── Special feature

│       └── Dikaryotic stage (n + n) in some fungi

│

├── Major Classes of Fungi

│

├── Phycomycetes

│   ├── Habitat

│   │   ├── Aquatic

│   │   ├── Moist/damp wood

│   │   └── Plant parasites

│   ├── Mycelium

│   │   └── Aseptate, coenocytic

│   ├── Asexual reproduction

│   │   ├── Zoospores (motile)

│   │   └── Aplanospores (non-motile)

│   ├── Sexual reproduction

│   │   └── Zygospore formation

│   │       ├── Isogamous

│   │       ├── Anisogamous

│   │       └── Oogamous

│   └── Examples

│       ├── Mucor

│       ├── Rhizopus (bread mould)

│       └── Albugo (mustard parasite)

│

├── Ascomycetes (Sac fungi)

│   ├── Mostly multicellular (some unicellular yeast)

│   ├── Habitat

│   │   ├── Saprophytic

│   │   ├── Parasitic

│   │   └── Coprophilous (dung-growing)

│   ├── Mycelium

│   │   └── Branched and septate

│   ├── Asexual reproduction

│   │   └── Conidia (on conidiophores)

│   ├── Sexual reproduction

│   │   ├── Ascospores

│   │   └── Asci (sac-like structures)

│   ├── Fruiting body

│   │   └── Ascocarps

│   └── Examples

│       ├── Penicillium

│       ├── Aspergillus

│       ├── Claviceps

│       ├── Neurospora

│       ├── Morels

│       └── Truffles

│

├── Basidiomycetes

│   ├── Common forms

│   │   ├── Mushrooms

│   │   ├── Bracket fungi

│   │   └── Puffballs

│   ├── Habitat

│   │   ├── Soil

│   │   ├── Logs and stumps

│   │   └── Plant parasites

│   ├── Mycelium

│   │   └── Branched and septate

│   ├── Reproduction

│   │   ├── No asexual spores usually

│   │   ├── Plasmogamy by somatic cell fusion

│   │   ├── Dikaryotic stage (n + n)

│   │   └── Basidiospores (exogenous)

│   ├── Fruiting body

│   │   └── Basidiocarps

│   └── Examples

│       ├── Agaricus (mushroom)

│       ├── Ustilago (smut)

│       └── Puccinia (rust fungus)

│

└── Deuteromycetes (Imperfect fungi)

    ├── Sexual stage unknown

    ├── Only asexual reproduction

    │   └── Conidia

    ├── Mycelium

    │   └── Septate and branched

    ├── Lifestyle

    │   ├── Saprophytes

    │   ├── Parasites

    │   └── Decomposers (mineral cycling)

    ├── Reclassification

    │   └── Moved to other groups when sexual stage found

    └── Examples

        ├── Alternaria

        ├── Colletotrichum

        └── Trichoderma 

 CBSE Class 11 exam practice set based on Kingdom Fungi (NEET + CBSE pattern). It includes all question types with answers.

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🧪 KINGDOM FUNGI – QUESTION BANK (CLASS 11 CBSE)

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A. VERY SHORT ANSWER QUESTIONS (1 MARK)

Q1. What type of nutrition is found in fungi?

Ans: Heterotrophic (absorptive nutrition)

Q2. Name the cell wall material of fungi.

Ans: Chitin

Q3. Give one example of unicellular fungus.

Ans: Yeast (Saccharomyces)

Q4. What is the fungal body called?

Ans: Mycelium

Q5. Name a symbiotic association of fungi and algae.

Ans: Lichens

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B. SHORT ANSWER QUESTIONS (2–3 MARKS)

Q1. Differentiate between hyphae and mycelium.

Ans:

• Hyphae → thread-like structures of fungi
• Mycelium → network of hyphae

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Q2. What are saprophytic fungi?

Ans:

• Fungi that feed on dead and decaying organic matter
• Example: Rhizopus

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Q3. What is plasmogamy?

Ans:

• Fusion of cytoplasm of two gametes during sexual reproduction in fungi

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Q4. Write two economic importance of fungi.

Ans:

• Production of antibiotics (Penicillium)
• Bread and alcohol production (Yeast)

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Q5. What is dikaryotic stage?

Ans:

• Stage in fungi where two nuclei (n + n) exist in one cell before fusion

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C. LONG ANSWER QUESTIONS (5 MARKS)

Q1. Explain reproduction in fungi.

Ans: Fungi reproduce in three ways:

1. Vegetative reproduction

   • Fragmentation, budding, fission

2. Asexual reproduction

   • Spores: conidia, zoospores, sporangiospores

3. Sexual reproduction

   • Steps:
     • Plasmogamy (cytoplasm fusion)
     • Karyogamy (nuclei fusion)
     • Meiosis (spore formation)

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Q2. Explain classification of fungi.

Ans: Fungi are classified into:

• Phycomycetes → aseptate hyphae, e.g., Rhizopus
• Ascomycetes → sac fungi, e.g., Yeast, Aspergillus
• Basidiomycetes → mushrooms, e.g., Agaricus
• Deuteromycetes → imperfect fungi, e.g., Trichoderma

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Q3. Explain nutrition in fungi.

Ans:

• Fungi are heterotrophic
• Types:
  • Saprophytes → dead matter
  • Parasites → living hosts
  • Symbionts → lichens, mycorrhiza
• They absorb nutrients from environment

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D. MULTIPLE CHOICE QUESTIONS (MCQs)

Q1. Fungal cell wall is made up of:

A. Cellulose
B. Peptidoglycan
C. Chitin
D. Lignin
Ans: C

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Q2. Bread mould belongs to:

A. Ascomycetes
B. Basidiomycetes
C. Phycomycetes
D. Deuteromycetes
Ans: C

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Q3. Yeast is:

A. Multicellular
B. Unicellular
C. Autotrophic
D. Algal
Ans: B

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Q4. Sexual spores in Ascomycetes are:

A. Zoospores
B. Basidiospores
C. Ascospores
D. Conidia
Ans: C

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Q5. Mushroom belongs to:

A. Phycomycetes
B. Ascomycetes
C. Basidiomycetes
D. Protista
Ans: C

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E. ASSERTION–REASON QUESTIONS

Q1.

Assertion (A): Fungi are heterotrophic organisms.
Reason (R): They lack chlorophyll.

A. Both A and R true, R explains A
B. Both true, R not explanation
C. A true, R false
D. A false, R true

Ans: A

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Q2.

Assertion: Deuteromycetes are called imperfect fungi.
Reason: Sexual reproduction is not observed in them.

Ans: A

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Q3.

Assertion: Yeast is multicellular fungus.
Reason: It reproduces by budding.

Ans: D (A false, R true)

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F. FILL IN THE BLANKS

1. The network of hyphae is called ________. Ans: Mycelium

2. Fungi cell wall is made of ________. Ans: Chitin

3. Sexual spores of Basidiomycetes are ________. Ans: Basidiospores

4. Lichens are association of fungus and ________. Ans: Algae

5. Deuteromycetes reproduce by ________ spores. Ans: Asexual (conidia)

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G. MATCH THE FOLLOWING

Column A	Column B
1. Rhizopus	A. Mushroom
2. Aspergillus	B. Bread mould
3. Agaricus	C. Sac fungi
4. Yeast	D. Common mould

Answers: 1 → B
2 → D
3 → A
4 → C

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H. STATEMENT QUESTIONS

Q1. Choose correct statement:

1. Fungi are autotrophic
2. Fungi have chitin cell wall
3. Fungi are always unicellular

Ans: Only 2 is correct

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Q2.

1. Fungi reproduce only sexually
2. Deuteromycetes lack sexual stage
3. All fungi are parasites

Ans: Only 2 is correct

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I. CASE STUDY QUESTION

Case:

A student observes white cotton-like growth on bread kept outside for 3 days. The organism has thread-like structures and produces spores.

Questions:

1. Identify the organism. Ans: Rhizopus (bread mould)

2. To which kingdom does it belong? Ans: Fungi

3. What is the thread-like structure called? Ans: Hyphae

4. What is the network of hyphae called? Ans: Mycelium

5. What type of nutrition does it show? Ans: Saprophytic

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🔗  Internal Links

/neet-biology/kingdom-monera-notes

/neet-biology/kingdom-protista-summary

/neet-biology/five-kingdom-classification

/neet-biology/fungal-reproduction-diagram

/neet-biology/class-11-biology-notes

/neet-biology/neet-biology-short-notes

/neet-biology/microorganisms-important-diagrams