EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 28.2, Problem 2R
Summary Introduction
To review:
To explain the distinguishing features and role of megagametophyte and pollen grains in the life cycle of gymnosperms.
Introduction:
During evolution, gymnosperms were the first successful terrestrial plants. Conifers are the group of gymnosperm which is found in abundant quantity. They mainly include pines and redwoods plants. Approximately 700 species of cone-bearing plants called conifers are found in the world.
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numerous, spiky, incisors procumbentExample: moleExample: shrew
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simple
short
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small or absent
Sanguinivory
very sharp upper incisors; reduced cheek teethExample: vampire bat
grooved
tubular, highly extensible
long
small or lacking
Herbivory (except nectivores)
incisors robust or absent; canines reduced or absent; diastema; cheek teeth enlarged with complex occlusal surfacesExample: beaver
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3. Shown below is the dental formula and digestive tract anatomy of three mammalian species
(A, B, and C). What kind of diet would you expect each species to have? Support your
answers with what you can infer from the dental formula and what you can see in the
diagram. Broadly speaking, what accounts for the differences?
Species A
3/3, 1/1, 4/4, 3/3
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cm 30
Species B
4/3, 1/1, 2/2, 4/4
cm 10
Species C
0/4, 0/0,3/3, 3/3
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3. Shown below is the dental formula and digestive tract anatomy of three mammalian species
(A, B, and C). What kind of diet would you expect each species to have? Support your
answers with what you can infer from the dental formula and what you can see in the
diagram. Broadly speaking, what accounts for the differences?
Species A
3/3, 1/1, 4/4, 3/3
cm 30
Species B
0/4, 0/0, 3/3, 3/3
cm 10
Species C
4/3, 1/1, 2/2, 4/4
E
0 cm 20
AIL
Chapter 28 Solutions
EBK LIFE: THE SCIENCE OF BIOLOGY
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