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Brooks Biodiversity Unit 2 Exam questions and answers 2025(graded A+).
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Brooks Biodiversity Unit 2 Exam questions and answers 2025(graded A+).
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Brooks Biodiversity Unit 2Exam questions and answers
2025(graded A+)
The Primary role of Fungi - answer Decomposers- they break things down
Modes of Nutrition in Fungi - answer Heterotrophs with extracellular
digestion
Exoenzymes - answer Fungi Release these enzymes outside of the cell
wall. Break down complex molecules into smaller organic molecules which
can be absorbed.
Extracellular Digestion - answer The release of exoenzymes out side of the
cell wall, followed by the absorption of nutrients..
Saprobes - answer Fungi that feed on non-living/dead organisms
Symbionts - answer Fungus that lives with another living organism (form a
symbiotic relationship)
Mutualism in Fungi - answer both organisms benefit, neither is harmed.
Ex: Lichens - fungi and algae (cyanobacteria)
Ex: Mycorrhizae - fungi and plant roots
Commensalism - answer One organism benefits, the other is unharmed
Parasitism - answer One organism benefits, the other is harmed
,Examples of Parasitism in Fungi - answer Ex: Fungus as a human parasite
(Athelete's Foot)
Ex: Fungus as a plant parasite
1. black stem rust on wheat
2. ergots on rye
3. strawberries with botrytis mold
4. pink ear rot of corn
Black Stem Rust - answer Parasitic relationship with fungus and plant.
Occurs on wheat
Ergots - answer Parasitic relationship with fungus and plant that occurs on
rye and gives hallucinogenic sensations
Botrytis Mold - answer Parasitic relationship with fungus and plants that
occurs on strawberries
Fungi Characteristics - answer 1. Heterotrophic
2. Extracellular Digestion
3. Chitin-Based Cell wall
4. Most fungi are made up of filaments called Hyphae
Hyphae - answer filaments (long and branching) that make up the
structure of a fungus
In most fungi, hyphae are the main mode of vegetative growth
Hyphae are Septate or Coenocytic
Yeast - answer Yeast is a unicellular fungi and do not have/grow hyphae
MOST FUNGI ARE MULTICELLULAR, BUT YEAST IS UNICELLULAR
Septate - answer You can see the cell separation because the nuclei are
confined in and separated by cell walls
, Think "separate"
Coenocytic - answer You cant see the cell separation. It is multinucleated
meaning that there are multiple nuclei not separated by a cell wall
Thallus/Mycelium - answer collectively refers to a bunch of hyphae that
together make up the body of the fungus
Hyphae (smallest unit) make up the mycelium (entire fungus body)
Haustoria - answer The hyphal tip of a parasitic fungus that penetrates
the cell of other organisms (the host)
After penetration these specialized hyphae release enzymes that break
down the cell wall, thus allowing greater potential movement of organic
carbon from host to fungus.
What is Fungi Most closely related to? - answer Fungi have cell walls and
fruiting bodies, so were originally thought to be plants. However, they are
most closely related to animals
Fungi Nuclei - answer Most fungi cells have 2 nuclei
Mitosis - answer Has NO prerequisite for cell division, all it needs is a
nucleus. What you start with is what you end with (identical nuclei and
identical DNA)
Meiosis - answer Cell must be a diploid (2n) Process of nuclear division
which the ploidy of the parent cell is halved
3 Types of Meiosis - answer Zygotic - Phylum Zygomycota
Gametic - Usually in animals
Sporic - Usually in plants
Ploidy - answer Number of sets of chromosomes present in a nucleus
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