Exam 28: The Evolution of Seed Plants

Refer to the figure. What is the name of the floral parts that collectively make up the calyx? Identify the correct label.

While hiking in South America, a member of your group becomes ill with fever and chills after passing through a swampy area.A resident of the area removes bark from a nearby tree and has the ill person chew on it, which has a beneficial effect.The effective ingredient was likely _______ from the _______ tree.

A seed of a flowering plant or gymnosperm may contain tissues from _______ generation(s).

Refer to the figure, which shows the evolutionary relationships among the angiosperms. If you discovered a new plant with transitional tracheid vessel elements but no true vessel elements, the plant would belong to which group shown?

Refer to the figure, which shows the evolutionary relationships among the angiosperms. Which group arose first?

For humans, two of the top benefits provided by seed plants are

Western medicine uses chemicals from plant sources in a variety of medical applications.Which of the following is an important anticancer drug that comes from extracts of the bark of Pacific yews?

In a search for medicines in a relatively unexplored tropical jungle, which approach is most likely to be successful?

Draw a perfect flower that embodies traits of the earliest known angiosperms.Be sure to label structures and explain features of your drawing.How have the structures in your drawing changed over the course of angiosperm evolution?

The pollen of a recently discovered flowering plant is captured at the base of the style.It is likely that there has been a developmental rearrangement placing receptive tissue from the _______ at the base of the style.

In a flower, the male organs are collectively called _______.

What is a primary difference between angiosperm and gymnosperm seeds?

A plant with a spontaneous mutation occurring in a gene involved in _______ formation would be unable to form proper seed coats, and this defect would ultimately result in seeds unable to cope with desiccation.

Which of the following is not a characteristic of an angiosperm?

Which tropical plant group, made up of palmlike plants, is the earliest-diverging clade of gymnosperms?

Cycads, ginkgos, gnetophytes, and conifers all fall within the more inclusive group called the _______, of which there are fewer than 1,200 living species.

A scientist takes a survey of a 1,000-acre plot and finds 200 gymnosperm plants.Of these, 180 belong to one group.This group is likely to be the

In gymnosperms, a female cone is made up of modified _______, and a male cone is composed of _______ along a central axis.

A newly discovered gymnosperm species having typical gymnosperm pollination biology would most likely be pollinated by

Research on an island off the coast of Australia turns up an angiosperm even more primitive than Amborella.In fact, it employs the most primitive means of transferring pollen, which is pollination by