BSC2011 Ch. 20 LearningCurve

Which feature of a new plant should make you confident that it is nonvascular?

A dependence of sporophytes on gametophytes

While examining plant fossil material, you find evidence of a heterosporous plant with stomata and archegonia. Why might you hesitate to classify this as a moss?

Heterospory evolved among the vascular plants

Which statement regarding double fertilization is true?

It results in the formation of triploid endosperm

Which of the land plant groups is considered to be the sister group of all the others?

Liverworts

Which group of angiosperms is thought to contain the most primitive living members?

Magnoliids

Which is more important in the plant life cycle, mitosis or meiosis?

Neither, because both are required to complete life cycle

Which is a function of the polyploid tissue formed in double fertilization?

Nourishing the developing sporophyte

Which statement about the extinct group of plants called rhyniophytes is most accurate?

Rhyniophytes were rooted to the soil by a rhizomes

Which is the correct order of events in the moss lifecycle?

Sperm in antheridium → sperm swims → sperm enters archegonium → sperm fertilizes egg

Which features of nonvascular plants make them most dependent upon the presence of water in their terrestrial habitats?

Swimming sperm and thin cuticles

Which statement about alternation of generations in land plants is true?

The gametophyte produces haploid gametes by mitosis

With regard to the life cycles observed in plants and animals, the two groups share the similarity of

a generation of multicellular diploid individuals

Members of the chlorophyte clade

are the sister group to the streptophytes

Both stoneworts and liverworts

contain chlorophylls a and b

Glaucophytes are an early clade of photosynthetic eukaryotes that

exhibited branched apical growth

The two major living groups of seed plants are the

gymnosperms and angiosperms

All seed plants can be classified as

heterosporous

A newly discovered algae that contains phycoerythrin but appears green most likely

lives in shallow water

Lycophytes have _______, while monilophytes have _______.

microphylls; megaphylls

A growth pattern that contributed to evolution of megaphylls is

overtopping

A key feature that aids plants in colonizing cool, dry habitats is the

seed

In the fern cycle, the

sporophyte is larger and longer-lived than the gametophyte

A newly discovered algae that retains its eggs should be classified as a

streptophyte

Despite lacking tracheids, nonvascular plants possess structures or characteristics that allow them to obtain and transport water and minerals on land. These include all of the following except

thick spore walls to prevent desiccation

The common ancestor of vascular plants had

tracheids