Chapter 27--Seedless Plants Homework

The life cycle in the accompanying figure could represent which organism?

A club moss

Which is the gametophyte form of most liverworts?

A thallus

A nonvascular plant having a single large chloroplast in each cell belongs to which phylum?

Anthocerophyta

Which of the following is the structural and molecular data that indicate that land plants probably descended from a group of green algae?

Charophytes

Which of the following is a characteristic shared between green algae and plants?

Chlorophylls a and b in plastids

Why are mosses and liverworts limited in size?

They lack vascular tissues.

The structure in the accompanying figure labeled as 4 is:

all of these options are true: a gamete. haploid. produced by mitosis.

Haploid gametophytes produce female gametangia known as:

archegonia

In alternation of generations, the haploid portion of the life cycle is called the _______________ because it gives rise to haploid gametes by mitosis.

gametophyte stage

Some liverworts reproduce asexually by forming tiny balls of tissue called:

gemmae

Many seedless plants produce spores of one morphological type, which is referred to as:

homospory

The gametophyte generation of ferns is the:

prothallus

When a moss spore lands in a suitable spot, it germinates and grows into a filament of cells called a:

protonema

Heterospory is believed to have led to the evolution of:

seeds

What do ferns lack?

seeds

When two gametes fuse, the diploid portion of the life cycle is called ________________________.

sporophyte generation

The sori of most ferns are found on which part of the plant?

Fronds

Which plant has a jointed hollow stem with reduced megaphylls?

Horsetail

The gametophyte is the dominant stage in the life cycle for which of the following plant groups?

Liverworts

____ are small leaves with a single vascular strand

Microphylls