Lec5

Question 1

• a class of fungi found in soil, fresh water, and saline estuaries.
• a division of zoosporic organisms in the kingdom Fungi becuse chitin cell walls.
• name is derived from Greek chytridion, meaning “little pot”
• characterized by presence of zoospores during life cycle.

Answer 1

Chytridiomycota

Question 2

Chytridiomycetes includes a large number of fungi
that are economically dangerous.
T/F?

Answer 2

F, includes a small number

Question 3

is one of the most important races of the Synchytriaceae and includes more than 150 species.

Answer 3

Synchytrium

Question 4

• zoospore nucleus divides many times with each daughter nucleus giving rise to a zoosporangium.
• are endobiotic.
• infect wild plants and rarely affect human affairs.

Answer 4

Synchytrium

Question 5

is commonly known as black bread mold + saprotroph

Answer 5

Rhizopus stolonifer

Question 6

• optimal temperature for growth 25-30 °C.
• spores shaped differently depending on available nutrients.
• grows rapidly and spreads by means of the stolons.
• behave as a parasite of plant tissues
• role in the early colonization of substrata in soil.

Answer 6

Rhizopus stolonifer

Question 7

defined as the lowest temperature that can kill all cells in ten minutes, is 60°C

Answer 7

thermal death point of Rhizopus stolonifer

Question 8

fungus parasites with insects, especially flies.

Answer 8

Entomophthora

Question 9

• natural regulation of the insect population.
• Conidiobolus species, only three have been incriminated in human

Answer 9

Economic importance of ENTOMOPHTHORAMYCOSIS

Question 10

is a saprophytic fungus that causes granulomatous lesions of the upper respiratory tract

Answer 10

Conidiobolus coronatus
(Economic importance of ENTOMOPHTHORAMYCOSIS)

Question 11

Sexual reproduction by the zygotic spores of the fungus resulting from the mating of two fungal strings in a manner very similar to other azygous fungi.
For which Genus?

Answer 11

Entomophthora

Question 12

• Spoilage of many foodstuffs and crops.
• Producing organic acids
• Alcohol production.
• Production of enzymes
  This is an economic importance of?

Answer 12

Rhizopus

Question 13

Rhizopus stolonifer grows rapidly and spreads by?

Answer 13

By means of the stolons.

Question 14

Synchytrium grows rapidly and spreads by means
of the stolons
T/F?

Answer 14

F, not Synchytrium, Rhizopus stolonifer

Question 15

They are characterized by the presence of zoospores during their life cycle.

Answer 15

Chytridiomycetes

Question 16

Most species of Synchytrium infect wild plants and rarely affect human affairs.
T/F?

Answer 16

T

Question 17

terrestrial in habitat, living in soil or on plants and animals

Answer 17

Zygomycota

Question 18

Hyphae typically lack cross walls or septa, therefore are coenocytic.

Answer 18

Zygomycota

Question 19

commonly known as black bread mold.

Answer 19

Rhizopus stolonifer

Question 20

spores are shaped differently depending on the available nutrients.

Answer 20

Rhizopus

Question 21

is an opportunistic agent of disease,
and cause infection in people with a weakened immunity.

Answer 21

Rhizopus