Educational worksheet focusing on protozoa and fungi, featuring diagrams of three organisms and questions about their classification and movement.

Let's solve the Protozoa, Fungi Worksheet step by step and explain each answer based on the diagrams and biological knowledge.

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Part 1: Identify Organisms A, B, and C

#### Organism A
- Diagram: Irregular shape with pseudopodia (false feet) extending from the cell.
- Moves by means of: Pseudopodia
- Type of protozoan: Amoeba
- Classification: Amoeboid protozoan

> ✔ Explanation: Amoebas move using pseudopodia — temporary projections of the cytoplasm that help them crawl along surfaces. They are heterotrophic and feed by phagocytosis.

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#### Organism B
- Diagram: Oval-shaped with a flagellum (long whip-like structure).
- Moves by means of: Flagellum
- Type of protist: Flagellate
- Classification: Flagellated protozoan

> ✔ Explanation: Flagellates use one or more flagella to swim through water. Example: *Trypanosoma* (causes sleeping sickness).

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#### Organism C
- Diagram: Oval-shaped with many hair-like structures around the edge.
- Moves by means of: Cilia
- Type of protozoan: Ciliate
- Classification: Ciliated protozoan

> ✔ Explanation: Ciliates have numerous cilia covering their surface for movement and feeding. Example: *Paramecium*.

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Fill in the Blanks:

| Question | Answer |
|--------|--------|
| Organism A moves by means of | pseudopodia |
| Organism A is this type of protozoan, a(n) | amoeba |
| Organism A is a(n) | amoeboid protozoan |
| Organism B moves by means of a(n) | flagellum |
| Organism B is this type of protist, a(n) | flagellate |
| Organism B is a(n) | flagellated protozoan |
| Organism C moves by means of | cilia |
| Organism C is a type of protozoan, a(n) | ciliate |
| Organism C is a(n) | ciliated protozoan |

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All protists are (circle):

✔ Unicellular → Most protists are unicellular, though some are colonial or multicellular (e.g., *Volvox*). But generally, they are classified as unicellular.

✔ Eukaryotic → Protists have membrane-bound nuclei and organelles.

✔ Heterotrophic OR Autotrophic → Protists can be both. Some are autotrophic (like algae), others are heterotrophic (like amoebas). So this is not exclusive.

But since it says "circle", choose:

→ Unicellular
→ Eukaryotic
→ Autotrophic OR Heterotrophic → Both are possible, so you can circle both if allowed, but typically, the correct classification is:

👉 Unicellular
👉 Eukaryotic
👉 Heterotrophic (if focusing on protozoa), but Autotrophic also applies to algae.

So best answer:
- Circle: Unicellular, Eukaryotic, and Autotrophic or Heterotrophic → both apply, so write: Autotrophic or Heterotrophic (since they vary)

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Name the 3 major divisions of protists and the characteristic by which they are classified:

Protists are often divided into three main groups based on mode of nutrition or method of movement. Here’s the standard classification:

#### a. SAR supergroup (or Amoebozoa) → Based on movement via pseudopodia
> (Note: This group includes amoebas and slime molds)

#### b. Alveolata → Presence of alveoli (small sacs under the cell membrane)
> Includes ciliates (e.g., *Paramecium*), dinoflagellates, and apicomplexans

#### c. Stramenopiles → Possess two flagella, one with hairs; include diatoms and brown algae

Alternatively, a simpler version used in many textbooks:

> Based on nutrition or locomotion:

✔ Commonly accepted 3 divisions:

| Division | Classification Basis |
|--------|----------------------|
| a. Protozoa | Heterotrophic – consume food like animals |
| b. Algae | Autotrophic – perform photosynthesis |
| c. Slime molds & Water molds | Fungus-like protists – decomposers, absorb nutrients |

But more accurately, the three major groups are:

1. Animal-like protists (Protozoa) → move and eat like animals
2. Plant-like protists (Algae) → photosynthetic
3. Fungus-like protists → absorb nutrients from dead matter

So final answers:

> a. Protozoa → Heterotrophic
> b. Algae → Autotrophic
> c. Fungus-like protists → Absorb nutrients from decaying matter

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List 3 examples of unicellular algae:

These are single-celled photosynthetic protists.

- a. Chlamydomonas
- b. Euglena *(note: sometimes considered both plant and animal-like)*
- c. Diatoms *(some are unicellular)*

✔ Examples:
1. Chlamydomonas
2. Euglena
3. Diatom (e.g., *Navicula*)

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List 3 examples of multi-cellular algae:

These are large, complex algae, often called seaweeds.

- a. Kelp (e.g., *Macrocystis*)
- b. Ulva (sea lettuce)
- c. Nori (used in sushi)

✔ Examples:
1. Kelp
2. Ulva
3. Rhodophyta (red algae) – e.g., *Porphyra*

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✔ Final Answers Summary:

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#### Organism A
- Moves by: pseudopodia
- Type: amoeba
- Is a(n): amoeboid protozoan

#### Organism B
- Moves by: flagellum
- Type: flagellate
- Is a(n): flagellated protozoan

#### Organism C
- Moves by: cilia
- Type: ciliate
- Is a(n): ciliated protozoan

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#### All protists are:
- Unicellular
- Eukaryotic
- Autotrophic or Heterotrophic (circle both)

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#### Three major divisions of protists:

a. Protozoa → Heterotrophic
b. Algae → Autotrophic
c. Fungus-like protists → Absorb nutrients from decaying matter

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#### Unicellular algae:
a. Chlamydomonas
b. Euglena
c. Diatom

#### Multicellular algae:
a. Kelp
b. Ulva
c. Nori

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