Chapter 25 Seedless Plants

The land plants are probably descendants of which of these groups?

Green Algae

Alternation of generations means that plants produce:

Both haploid and diploid multicellular organisms

Which of the following traits of land plants allows them to grow in height?

Tracheids

How does a haplontic plant population maintain genetic diversity?

Zygotes are produced by random fusion

What characteristic of Charales would enable them to survive a dry spell?

Sporopollenin

Which one of these characteristics is present in land plants and not in Charales?

Alternation of Generations

A scientist sequences the genome of Chara, red algae, and a tomato plant. What result would support the conclusion that Charophytes should be included in the Plantae kingdom?

The Chara genome is more similar to the tomato plant genome than the red algae genome.

Which of the following features does not support the inclusion of Charophytes in the Plantae kingdom?

Charophytes are multicellular organisms that lack vascular tissue.

Which of the following structures is not found in bryophytes?

Root

Stomata appear in which group of plants?

Hornworts

The chromosome complement in a moss protonema is:

1n

Why do mosses grow well in the Arctic tundra?

They do not have true roots and can grow on hard surfaces.

A botanist travels to an area that has experienced a long, severe drought. While examining the bryophytes in the area, he notices that many are in the same life-cycle stage. Which life-cycle stage should be the most common?

Gametophyte

Microphylls are characteristic of which types of plants?

Club mosses

A plant in the understory of a forest displays a segmented stem and slender leaves arranged in a whorl. It is probably a ________________.

horsetail

The following structures are found on the underside of fern leaves and contain sporangia:

Sori

The dominant organism in fern is the ____________________.

sporophyte

What seedless plant is a renewable source of energy?

Sphagnum moss

How do mosses contribute to returning nitrogen to the soil?

Mosses decompose rocks and release nitrogen

The production of megaphylls by many different species of plants is an example of _____________________.

Parallel Evolution