Exam 30: Green Plants

To colonize,land plants had to overcome a number of difficulties.However,once this occurred they were able to exploit more abundant resources.Which of the following resources were more plentiful on land than in water during the early evolution of land plants?

You want to get rid of your cough and stuffy nose,and a friend offers you a cup of tea.After you drink the tea,you realize that you are feeling relief from your symptoms.What plant compound was most likely found in the tea?

Which of the following innovations is not associated with angiosperm diversification?

Conifers and pines both have needlelike leaves.Why might their leaves be of this type?

Use the following information when answering the corresponding question(s). Scarlet gilia (Ipomopsis aggregata)usually has red flowers in an inflorescence of up to 250 flowers.In certain populations in the Arizona mountains,however,the flowers range from red to pink to white.In early summer,most of the flowers were red.Six to eight weeks later,the same individual plants were still present;the flowers ranged from pink to white,and few red flowers were present.The major pollinators early in the season were two species of hummingbirds active during the day;they emigrated to lower elevations,and the major pollinator later in the season was a hawk moth (a type of moth).The hawk moth was most active at sunset and later,and it preferred light pink to white flowers after dark.When hummingbirds were present,more red flowers than white flowers produced fruit.When only hawk moths were present,more white flowers produced fruit (K.N.Paige and T.G.Whitham.1985.Individual and population shifts in flower color by scarlet gilia: A mechanism for pollinator tracking.Science 227:315-17). -Refer to the paragraph on scarlet gilia.Late in the season,when only hawk moths were present,researchers painted the red flowers white.What would you expect?

Which of these processes does not result in the formation of a different generation in a plant's sexual life cycle?

The presence of which of the following would allow you to place a plant definitively in the Angiosperms rather than the Gymnosperms?

Because they are morphologically simple,Psilotophyta have traditionally been thought to be a basal group in the radiation of land plants.Molecular phylogenies have challenged this hypothesis and support the alternative hypothesis that _____.

Which of these are spore-producing structures?

Which of the following is a correct element of alternation of generations?

Use the following information when answering the corresponding question(s). Scarlet gilia (Ipomopsis aggregata)usually has red flowers in an inflorescence of up to 250 flowers.In certain populations in the Arizona mountains,however,the flowers range from red to pink to white.In early summer,most of the flowers were red.Six to eight weeks later,the same individual plants were still present;the flowers ranged from pink to white,and few red flowers were present.The major pollinators early in the season were two species of hummingbirds active during the day;they emigrated to lower elevations,and the major pollinator later in the season was a hawk moth (a type of moth).The hawk moth was most active at sunset and later,and it preferred light pink to white flowers after dark.When hummingbirds were present,more red flowers than white flowers produced fruit.When only hawk moths were present,more white flowers produced fruit (K.N.Paige and T.G.Whitham.1985.Individual and population shifts in flower color by scarlet gilia: A mechanism for pollinator tracking.Science 227:315-17). -Refer to the paragraph on scarlet gilia.Some plants changed their flowers to lighter colors,and some retained the same darker color all season.Which plants do you expect produced more fruit?

About 450 million years ago,the terrestrial landscape on Earth would have _____.

The herbicide 2,4-D affects the metabolism of dicots and kills most of them.What is a common feature of plants that are susceptible to 2,4-D?

What do the fuels wood and coal have in common?

Bioprospectors and ethnobotanists search for plants and plant products used for medicines by native cultures.The major function of the medicinal compounds in plants is to _____.

The most basal lineages of land plants include _____.

Which of these activities is not a part of development of crop plants from wild relatives?

Which of these time intervals,based on plant fossils,came last (most recently)?

In general,liverworts have a cuticle and pores.However,some species do not have pores.What would you predict concerning the cuticle of these species and why?

Where are you least likely to see green algae?