Ch. 31 Fungi HW

The following statements describe something about the body structures or functions of fungi

1. Some fungi secrete digestive enzymes into the environment and then absorb the digested nutrients. 2. All fungi are heterotrophs; some species live as decomposers and others as symbionts. 3. Some fungi can grow as either filamentous or single-celled forms.

Fungi produce _____ spores

1N

Karyogamy produces a _____.

2N zygote

Where does meiosis occur in a mushroom?

Basidia

The process indicated by the letter _____ produces a diploid structure.

C. Karyogamy produces a diploid zygote.

True or false? In most fungi, fertilization is complete after the cells fuse together

F! In most fungi, fertilization is a two-step process consisting of the fusion of cells and then the fusion of nuclei in the fused cells.

Basidia produce spores by a process known as _____.

Meiosis

True or false? Most of the cells in a mushroom contain haploid nuclei.

T! A mushroom consists mainly of hyphae that are heterokaryoti

Which of these contains two haploid nuclei?

The heterokaryotic stage is produced by plasmogamy.

Septate hyphae

divided into cells by crosswalls, or septa

Coenocytic hyphae

do not have septa; consist of a continuous cytoplasmic mass that contains many nuclei and organelles

Plasmogamy

fusion of cytoplasm from different individuals.

Heterokaryotic

organisms that contain genetically distinct nuclei (n+n)