Biology Sem 2 Final PREP

The organic compounds that evolved on Earth and were required for the origin of life were:

• Urea and amino acids

• Urea and nucleic acids

• Proteins and amino acids

• Proteins and nucleic acids (such as DNA or RNA)

The Permian extinction was _____.

• The smallest mass extinction

• The biggest mass extinction

• Not a mass extinction

• None of these

During the Cambrian Period, many types of primitive sponges evolved, as did ocean invertebrates called _______.

• trilobites

• Vascular plants

• Lizards

• Lobster

The Mesozoic began with the supercontinent _____.

• Laurasia

• Pangaea

• Euramerica

• Gondwana

As the Triassic Period gave way to the _______ Period, the supercontinent Pangaea began to break apart.

• Jurassic

• Cretaceous

• Permian

• Triassic

The dominant animals on Earth during the Cenozoic Era were

• dinosaurs

• bacteria

• fish

• mammals

The modern era is the _____.

• Paleozoic

• Mesozoic

• Cenozoic

• Cambrian

An individual organism that exhibits a higher fitness level is more likely to ________.

• struggle

• reproduce

• mutate

• hibernate

What process is observed when organisms with an advantageous variation for a trait within a population survive and pass on their traits?

• Selective breeding

• Artificial selection

• Natural selection

What is an example of a fossil?

• Human heart

• Dinosaur skeleton

• Chimpanzee brain