Quiz

QUIZ

1. What is the fungal cell wall made from?

a. Cellulose b. Chitin and glucans c. Lignans d. Peptidoglycans

Answer: b. The cell wall of fungi is made from chitin and glucans, which makes them relatively unique among the different species of cell-walled organisms.

2. What are the different phyla of the kingdom fungi based on?

a. Cell wall characteristics b. Metabolic pathways c. Spore characteristics d. Type of fruiting bodies

Answer: c. The different phyla are based on the characteristics of their spores. Some have asexual spores, others have sexual spores, and still others have both asexual and sexual spores.

3. What is not a major function of the septa in the hyphae of a fungal mycelium?

a. To block off areas that have been damaged b. To allow for branching of the hyphae c. To allow for rapid communication between the compartments d. To improve the rigidity of the hypha

Answer: b. The septa have several functions that involve each of the above except for branching of the hyphae.

4. How do fungi get their nutrition?

a. They are photosynthetic b. They engulf food into their cells c. They get food from the soil d. They take in food from decaying organisms

Answer: d. Many fungi are saprophytic and take in food from the environment by digesting the contents of decaying organisms.

5. In looking at hyphae, what is a coenocytic fungus?

a. A highly branched hypha b. A hypha with a fruiting body attached c. An aseptate fungus that is multinucleated d. A single-celled fungus

Answer: c. A coenocytic fungus is an aseptate fungus that is multinucleated.

6. Fungi are often considered saprophytic. What does that mean?

a. It can form symbiotic relationships with other organisms b. It can live off of dead or decomposing organisms c. It can have two or more different morphologies d. It can cause animal or plant diseases

Answer: b. Many fungi are saprophytic, meaning that they can live off of dead or decomposing organisms.

7. What is not true of sexual reproduction of fungal hyphae?

a. The true mycelium is a haploid organism b. The hypha fuse with another hypha to form a multinucleated cell. c. The zygote is a diploid organism. d. The spores will combine in sexual reproduction.

Answer: d. The sexual reproduction does not involve spores combining. It is the hyphae that combine in order to form a diploid organism that then undergoes meiosis in order to form haploid spores.

8. In the sexual reproduction of fungi, what is karyogamy?

a. The fusion of two nuclei to make a diploid nucleus b. The meiotic process that occurs in the spores c. The combining of cells in order to form a multinucleated cell d. The mitosis that occurs in the zygote

Answer: a. Karyogamy is the fusion of two nuclei from different organisms into a diploid nucleus.

9. What is not usually a member of the lichen relationship?

a. Cyanobacteria b. Methanogenic archaea c. Ascomycetes d. Basidiomycetes

Answer: b. Any of these can participate in the formation of a lichen relationship except for methanogenic archaea, which do not survive well in this type of relationship.

10. In a lichen, what is not something that the fungus will do to help the cyanobacterial partner?

a. Help the lichen attach to the substrate b. Help protect the cyanobacteria from excessive sunlight c. Help fix nitrogen from the atmosphere d. Protect the cyanobacteria from desiccation

Answer: c. In a lichen relationship, it is the cyanobacteria that fix nitrogen and not the other way around. The fungi will do each of the other things in this relationship.