Life Science

Chapter 15: Birds and Mammals

Standardized Test Practice

1.
Which letter represents the yolk sac?

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A)A
B)B
C)D
D)C
2.
What does the diagram show?

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A)an amniotic egg
B)an amphibian egg
C)a jellylike egg
D)a soft-shelled egg
3.
Which of the following is a marsupial?
A)an echidna
B)an opossum
C)a panda
D)a platypus
4.
Which of the following is not an adaptation that enables birds to fly?
A)almost hollow skeleton
B)feathers
C)strong muscles
D)crop
5.
What distiguishes monotremes from other mammals?
A)They lay eggs with leathery shells.
B)Females have an external pouch.
C)Their mammary glands have well-developed nipples.
D)Their embryos completely develop inside the female's uterus.
6.
What distiguishes placental mammals from other mammals?
A)Their young develop in eggs with leathery shells.
B)Their young complete development in an external pouch.
C)They feed their young milk from mammary glands.
D)Their embryos completely develop inside the female's uterus.
7.
An organ consisting of embryonic and maternal tissues that nourishes a developing embryo inside the mother is called
A)external pouch.
B)placenta.
C)mammary gland.
D)ovary.
8.
Flight muscles attach to a bird's
A)bony tail.
B)crop.
C)down feathers.
D)keel.
9.
How can you tell that diagram B shows a carnivore?

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A)large premolars
B)large canine teeth
C)large molars
D)the presence of incisors
10.
What kind of diet does the animal shown in diagram A probably eat?

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A)only meat
B)only plants
C)plants and meat
D)only nuts and berries
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