Fungi

Question 1

What is fungi?

Answer 1

They can be unicellular but are mostly multicellular. They have a cell wall made up of chitin.

Question 2

List 5 structural features of fungi.

Answer 2

1. Are eukaryotic cell structures with membrane-bound organelles.
2. Cell wall made of chitin.
3. Are unicellular or multicellular.
4. Reproduce by spores.
5. Can be made up of filaments (hyphae)

Question 3

What are the 2 effects of fungi?

Answer 3

1. Mostly external.
2. Inflammation and irritation of skin.

Question 4

What is one example of a fungus?

Answer 4

1. Chytridiomycosis.

Question 5

What is the invasion method of chytridiomycosis?

Answer 5

Enters the skin.

Question 6

What is the transmission method of chytridiomycosis?

Answer 6

Indirect - waterborne free due to swimming zoospores or contact with contaminated water.
Direct - contact between infected individuals.

Question 7

List 4 symptoms of chytridiomycosis.

Answer 7

1. Thickening of the skin affects gas exchange and osmoregulation.
2. Excessive shivering.
3. Sitting out in the open.
4. Lethargic.

Question 8

Outline the 4 steps of the life cycle of chytridiomycosis.

Answer 8

1. Single-celled flagellated zoospore enters the skin cells.
2. Thallus forms.
3. New zoospores are produced in the thallus as it matures through asexual reproduction.
4. Zoospores are released into water where they swim to find a new host.