Multiple Choice
Mutations in what class of genes have probably been responsible for many of the changes leading to the great diversity of life existing today?
24. History of Life on Earth
History of Life on Earth
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Which of the following occurred during the Mesozoic era?
A
Marine reptiles disappeared.
B
Large mammalian herbivores and carnivores arose.
C
Fishes emerged as top predators in marine food webs.
D
A great diversity of new body plans emerged among animals.
E
Flight evolved in pterosaurs and birds.
Verified step by step guidance1
Understand the context of the Mesozoic era, which spans from approximately 252 to 66 million years ago and is divided into three periods: Triassic, Jurassic, and Cretaceous.
Recognize that the Mesozoic era is often referred to as the 'Age of Reptiles' due to the dominance of dinosaurs and other reptiles during this time.
Identify key evolutionary events during the Mesozoic era, such as the emergence of flight in pterosaurs and birds, which is a significant adaptation that occurred during this time.
Consider the incorrect options: Marine reptiles did not disappear during the Mesozoic; they were prevalent. Large mammalian herbivores and carnivores arose after the Mesozoic. Fishes were already established as top predators before the Mesozoic. The emergence of diverse body plans is more characteristic of the Cambrian explosion.
Conclude that the correct answer is the evolution of flight in pterosaurs and birds, which is a notable event of the Mesozoic era.
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