lab 9

Question 1

fungi

Answer 1

• extremely diverse group ranging from the single celled yeasts to the familiar multicellular moulds
• vary greatly in size, shape, colour and habitat
• all fungi are eukaryotic, absorptive heteroteophs
• reproduce using asexual and/or sexual spores
• classified and named based on their sexual spore-producing structure

Question 2

multicellular fungi

Answer 2

• composed of branched, thread-like hyphae, collectively called mycelia (singular mycelium)
• mycelia may be either vegetative or reproductive
• vegetative mycelia are not usually visible because their hyphae grow below the surface of its habitat
• reproductive mycelia may be either cottony masses with pigmented spores as in bread mould or a tightly woven mass of hyphae in a spore-producing fruiting body as in mushrooms

Question 3

asexual spores

Answer 3

• usually produced as a means of rapid dispersal and growth when environmental conditions are favourable
• ex: penicillium

Question 4

sexually-reproduced spores

Answer 4

• produced for both dispersal and withstanding adverse environmental conditions
• may or may not involve the formation of a fruiting body
• ex: mucor mucedo

Question 5

three types of lichens

Answer 5

1. crustose: flat crust-like forms that are often found on rocks with only the upper surface visible
2. fruticose: shrub-like, branching, elongate types attache at one point to substrate. ex: “reindeer moss”
3. foliose: flat, leaf-like forms more loosely attached to substrate with both upper and lower surfaces visible.