Part 1

Question 1

In the life cycle of protozoans, there are two main forms of the organism.

Name and briefly describe the two types.

Answer 1

1. ) Cyst = dormant (non-feeding) form
2. ) Trophozoite = vegetative form

Question 2

How do protozoans reproduce?

Answer 2

asexually or sexually

Question 3

How do protozoans asexually and sexually reproduce?

Answer 3

Asexual Reproduction

1. ) Binary fission - 1 cell becomes 2; equal division
2. ) Budding - 1 cell becomes 2; unequal division

Sexual Reproduction

1. ) Protozoan conjugation
2. ) Cell fusion

Question 4

The body of a fungus is called a _______.

Answer 4

thallus

(plural = thalli)

Question 5

The thalli of molds are multicecllular and made up of densely packed structures called ______.

Answer 5

The thalli of molds are multicecllular and made up of densely packed structures called hyphae.

Question 6

The thalli of molds are multicecllular and made up of densely packed structures called ______.

Many hyphae join together to form filamentous structures called _______.

Answer 6

The thalli of molds are multicecllular and made up of densely packed structures called hyphae.

Many hyphae join together to form filamentous structures called mycelia.

Question 7

Dimorphic Fungus

In a human body, fungus is in the form of _______ due to high temperature and high levels of CO₂.

In the environment, fungus is in the form of ______ due to low temperature and low levels of CO₂.

Answer 7

Dimorphic Fungus

In a human body, fungus is in the form of yeast due to high temperature and high levels of CO₂.

In the environment, fungus is in the form of mold due to low temperature and low levels of CO₂​.

Dimorphism is usually observed in pathogenic fungi (fungi that cause disease in animals)

Question 8

Asexual Reproduction in Fungi

________ are spores within a sac.

Answer 8

Sporangiospores are spores within a sac.

Question 9

Asexual Reproduction in Fungi

________ are spores not enclosed in a sac;

usually form at the tips or sides of hyphae.

Answer 9

Conidia are spores not enclosed in a sac;

usually form at the tips or sides of hyphae.