Earth Science: Geology, the Environment, and the Universe

Section 2: Mesozoic Life

Mesozoic Life

1
What is a sauropod dinosaur?
A)one type of saurischian dinosaur
B)a quadrupedal dinosaur
C)a herbivorous dinosaur
D)all of the above
2
What characteristic of dinosaurs distinguishes them from other reptiles?
A)Most reptiles lived in the oceans during the Mesozoic.
B)the large range of sizes of dinosaurs
C)the upright posture of dinosaurs
D)Dinosaurs were herbivores and carnivores.
3
How do scientists distinguish between mammals and reptile fossils?
A)the presence or absence of a wishbone
B)by their hip-bones and the shape of their teeth
C)by the shape of the teeth, number of ear bones, and the number of lower jawbones
D)the ear bone structure only
4
What did all ornithischian dinosaurs have in common?
A)They were bipedal.
B)They were carnivores.
C)They were large.
D)All were herbivores.
5
What theory may explain the mass extinction event at the end of the Mesozic Era?
A)the Big Bang theory
B)the theory of evolution
C)the theory of plate tectonics
D)the meteorite impact theory
6
What is a pterosaur?
A)a swimming reptile that resembles a modern dolphin
B)a flying reptile that had light, hollow bones like modern birds
C)a modern-day turtle that evolved in the Mesozic Era
D)a mammal that lived in the Mesozoic grasslands
7
What is the Mesozoic commonly referred to?
A)the Age of Reptiles
B)the Age of Humans
C)the Age of the First Mammals
D)the Permo-Triassic Extinction age
8
Which new plant evolved during the Cretaceous and dominated the terrestrial landscape?
A)angiosperms
B)conifers
C)cycads
D)grasses
9
Why are ammonites good index fossils of the Mesozoic Era?
A)Ammonites were abundant and diverse throughout the Mesozoic and became extinct at the end of the Mesozoic.
B)Ammonite species were shortlived.
C)cycads
D)all of the above
10
According to the tables, which is the oldest organism?
A)Aeger
B)Crateraster
C)Cypridea
D)Pleurotomaria
11
What is a rudist?
A)a reef-building coral that evolved at the end of the Triassic Period
B)an asymmetic clam that built reefs during the Cretaceous Period
C)a photosynthetic phytoplankton that evolved during the Mesozic Era
D)the base of the food chain in Mesozoic oceans
12
According to the tables, how long ago did Gonioteuthis exist?
A)about 200 million years ago
B)about 70 million years ago
C)about 240 million years ago
D)about 150 million years ago
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