Question 1

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

Accepted Answer

A)  Stigma (
A)  
B)  Petals (
E)  
C)  Ovule (
D)  
D)  Anthers (F) 
E)  Sepals (H)

Question 2

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.

Accepted Answer

A)  atropine; hazel 
B)  atropine; belladonna 
C)  quinine; Pacific yew 
D)  quinine; Cinchona 
E)  bromelain; pineapple

Question 3

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

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
E)  five

Question 4

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?

Accepted Answer

A)  Monocots 
B)  Eudicots 
C)  Magnoliids 
D)  Water lilies 
E)  Star anise

Question 5

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

Accepted Answer

A)  Monocots 
B)  Eudicots 
C)  Magnoliids 
D)  Water lilies 
E)  Star anise

Question 6

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

Accepted Answer

A)  nutrition and a source of medicine. 
B)  hydration and a source of medicine. 
C)  nutrition and aesthetic value. 
D)  aesthetic value and hydration. 
E)  a source of medicine and aesthetic value.

Question 7

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?

Accepted Answer

A)  Atropine 
B)  Bromelain 
C)  Ephedrine 
D)  Menthol 
E)  Taxol

Question 8

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

Accepted Answer

A)  Looking for plants with brightly colored leaves 
B)  Talking to local residents to find out which plants they use 
C)  Watching for plants whose leaves are eaten by native animals 
D)  Looking for flowers that attract the greatest number of pollinators 
E)  Trying as many species as possible

Question 9

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?

Accepted Answer

The answer of Draw a perfect flower that embodies traits...

Question 10

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.

Accepted Answer

A)  stigma 
B)  ovary 
C)  anther 
D)  petal 
E)  sepal

Question 11

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

Accepted Answer

The answer of In a flower, the male organs are...

Question 12

What is a primary difference between angiosperm and gymnosperm seeds?

Accepted Answer

A)  Angiosperm seeds contain endosperm, while gymnosperm seeds do not. 
B)  Angiosperm seeds have seed coats, while gymnosperm seeds do not. 
C)  Gymnosperm seeds have seed coats, while angiosperm seeds do not. 
D)  Angiosperm seeds contain embryos, while gymnosperm seeds do not. 
E)  Gymnosperm seeds are protected by fruits, while angiosperm seeds are not.

Question 13

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.

Accepted Answer

The answer of A plant with a spontaneous mutation occurring...

Question 14

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

Accepted Answer

A)  Flowers 
B)  Seeds 
C)  A vascular system 
D)  Ovules 
E)  A free-living gametophyte generation

Question 15

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

Accepted Answer

A)  Angiosperms 
B)  Ginkgos 
C)  Conifers 
D)  Gnetophytes 
E)  Cycads

Question 16

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

Accepted Answer

The answer of Cycads, ginkgos, gnetophytes, and conifers all fall...

Question 17

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

Accepted Answer

A)  cycads. 
B)  ginkgos. 
C)  gnetophytes. 
D)  conifers. 
E)  angiosperms.

Question 18

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

Accepted Answer

A)  leaves; modified branches 
B)  branches; modified branches 
C)  branches; woody scales 
D)  leaves; herbaceous scales 
E)  branches; modified leaves

Question 19

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

Accepted Answer

A)  water. 
B)  beetles. 
C)  butterflies. 
D)  wind. 
E)  small mammals.

Question 20

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

Accepted Answer

A)  wind. 
B)  bees. 
C)  ants. 
D)  moths. 
E)  songbirds.

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?