BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 39, Problem 6SA
Summary Introduction
Introduction:
The animal mating system in which both the sexes have only a single mate for the lifetime is called monogamy. After mating and production of young ones, providing parental care to the individuals becomes important. Some animals do not provide any parental care to the young ones whereas in some cases both the parents cooperate in providing care or sometimes only one parent is involved in providing care to the young ones.
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Why is mating important in external fertilization of animals?
A) It ensures survival of offspring
B) It ensures sperm dilution
C) For pleasure
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Which is NOT a common characteristic of mammals?
A) have small brains compared to skull size
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C) have hair or fur
D) young are fed milk produced by the mothers mammary glands
Mammals are distinguished from other animals based ona. size and hair type.b. mode of reproduction.c. number of limbs and method of caring for young.d. number of mammary glands and number of offspring.
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