Protozoa Key Concepts 2025/2026 Exam
Questions and Answers | 100% Solved
Mycology - 🧠 ANSWER ✔✔The scientific study of fungi — organisms that
include molds, yeasts, and mushrooms.
Negative impacts of fungi - 🧠 ANSWER ✔✔About 200 species are
pathogenic to humans and animals, cause plant diseases that damage
crops and food supplies, can spoil food and stored products, and some
produce mycotoxins that are harmful or carcinogenic.
Positive impacts of fungi - 🧠 ANSWER ✔✔Decompose dead organic
matter, recycling nutrients to the ecosystem, form mycorrhizae, serve as
food sources (mushrooms) and food production (bread, beer, wine), and
,produce industrial and medical compounds (e.g., citric acid, penicillin, other
antibiotics).
Classification of fungi - 🧠 ANSWER ✔✔Fungi are classified by their
physical appearance (colony and hyphal structure) and reproductive spores
(especially spore type and formation method).
Thallus - 🧠 ANSWER ✔✔The fungal body made of long filaments called
hyphae.
Septate Hypha - 🧠 ANSWER ✔✔Hyphae with cross-walls (septa) dividing
cells.
Coenocytic Hypha - 🧠 ANSWER ✔✔No cross-walls; a continuous
cytoplasmic mass with many nuclei.
Vegetative Hypha - 🧠 ANSWER ✔✔Grows into substrate to absorb
nutrients.
Aerial Hypha - 🧠 ANSWER ✔✔Projects above surface to produce
reproductive spores.
Mycelium - 🧠 ANSWER ✔✔Mass of intertwined hyphae forming the visible
filamentous colony.
, Budding Yeasts - 🧠 ANSWER ✔✔A small protrusion (bud) forms on the
parent cell; the nucleus divides and one nucleus moves into the bud.
Pseudohypha - 🧠 ANSWER ✔✔When buds fail to detach completely from
the parent cell, forming chains of elongated cells (as in Candida albicans).
Fission Yeasts - 🧠 ANSWER ✔✔The parent cell elongates, the nucleus
divides, and the cell splits evenly into two new cells.
Facultative anaerobic growth - 🧠 ANSWER ✔✔Can grow with oxygen
(aerobic respiration) or without oxygen (fermentation to ethanol and CO₂).
Dimorphic Fungi - 🧠 ANSWER ✔✔Exhibit two forms depending on
temperature: At 25 °C (environmental), they grow as molds with hyphae; at
37 °C (body temperature), they grow as yeasts.
Fungal Spores - 🧠 ANSWER ✔✔Reproductive cells formed from the parent
fungus that can germinate into a new organism under favorable conditions.
Asexual spores - 🧠 ANSWER ✔✔Formed by mitosis from a single
organism; offspring genetically identical.
Conidiospores - 🧠 ANSWER ✔✔Unicellular or multicellular spores not
enclosed in a sac.
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