29.1

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The most recent common ancestor of all land plants was most similar to modern-day members of which group?

c. Charophycea

Peptidoglycan is to the structural integrity of bacteria as ____ is to the structural integrity of plant spores.

e. sporopollenin

Which kind of plant tissue should lack phragmoplasts?

d. tissues performing nuclear division without intervening cytokineses

The following are common to both charophyceans and land plants except

b. lignin.

A number of characteristics are very similar between charophyceans and members of the kingdom Plantae. Of the following, which characteristic does not provide evidence for a close evolutionary relationship between these two groups?

a. alternation of generations

A researcher wants to develop an assay (test) that will distinguish charophyceans and land plants from chlorophyte green algae. Which of the following chemicals would be the best subject for such an assay?

d. glycolate oxidase-an enzyme of peroxisomes that is associated with photorespiration

In animal cells and in the meristem cells of land plants, the nuclear envelope disintegrates during mitosis. This disintegration does not occur in the cells of most protists and fungi. According to our current knowledge of plant evolution, which group of organisms should feature a mitosis most similar to that of land plants?

c. charophyceans

On a field trip, a student in a marine biology class collects an organism that has differentiated organs, cell walls of cellulose, and chloroplasts with chlorophyll a. Based on this description, the organism could be a brown alga, a red alga, a green alga, a charophycean recently washed into the ocean from a freshwater or brackish water source, or a land plant washed into the ocean. Which of the following features would definitively identify this organism as a land plant?

e. presence of embryos

Some green algae exhibit alternation of generations. All land plants exhibit alternation of generations. No charophyceans exhibit alternation of generations. Keeping in mind the recent evidence from molecular systematics, the correct interpretation of these observations is that

b. plants evolved alternation of generations independently of green algae.

Bryophytes have all of the following characteristics except

c. lignified vascular tissue.

Which putative taxon is essentially equivalent to the "embryophytes"?

b. Plantae

protection from predators

B. tracheids and phloem

protection from desiccation

C. secondary compounds

transport of water, minerals, and nutrients

A. nonflagellated sperm

Which of the following was not a challenge for survival of the first land plants?

d. animal predation

The following are all adaptations to life on land except

a. rosette cellulose-synthesizing complexes.

Mitotic activity by the apical meristem of a root makes all of the following more possible except

a. increased length of the above-ground stem.

Which of the following is not a secondary compound of embryophytes?

b. alkaloids

Which event during the evolution of land plants probably made the synthesis of secondary compounds most beneficial?

d. the rise of herbivory

If one were attempting to catalog the largest amount of genetic diversity among plant-like organisms, then which group of organisms should one choose?

b. Viridiplantae

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