Evo2 Quizz

There are __ main taxa.

• 4

• 6

• 8

• 10

In order for speciation to occur there MUST be

• reproductive isolation

• genetic drift

• gene flow

• bottleneck effect

Answer explanation

In order for the process of speciation to begin, there must be some form of reproductive isolation/populations of the same species are separated (geographically, by behavior, etc) and thus cannot reproduce with each other.

Genetic drift and the bottleneck effect might be an evolutionary mechanism to drive speciation, but it is not necessary.

Gene flow is the opposite of reproductive isolation. It's when two populations can reproduce with each other (ex duing migration)

66 million years ago, 78% of all life on earth was killed due to an asteroid hitting earth. This is an example of:

• Mass Extinction

• Adaptive Radiation

• Co-Evolution

• Convegent Evolution

Bats and dolphins both navigate their environments through echolocation. This ability has risen independently in cetaceans (whales, dolphins) and bats. In other words, bats and dolphins don't have a common ancestor capable of echolocation. This is an example of?

• Adaptive Radiation

• Co-Evolution

• Divergent Evolution

• Convergent Evolution

Analogous structures are the result of

• Convergent Evolution

• Divergent Evolution

• Co-Evolutoin

• Mass Extinction

Despite not sharing a winged ancestor, birds and bats both have wings. Wings are a ____ structure, and have arisen from what pattern of evolution?

• Homologous, Divergent

• Analogous, Divergent

• Homologous, Convergent

• Analogous, Convergent

After the dinosaurs went extinct, the remaining mammals diversified into niches left by the dinosaurs, giving rise to many new species of mammals. This is an example of?

• Mass Extinction

• Adaptive Radiation

• Co-Evolution

• Convergent Evolution

Answer explanation

Some Latin-American hummingbirds have bills that are long and curved, matching long and sharply curved flowers in their environment. The hummingbirds can easily sip nectar from the flower while conducting pollination. These two organisms may have evolved by _____.

• Mass Extinction

• Coevolution

• Convergent Evolution

• Divergent Evolution

Horses, zebras, and donkeys are all different species. They are believed to have come from one common ancestor and just become more and more different due to their different environmental conditions. These animals may have evolved by _____.

• Adaptive Radiaton

• Divergent Evolution

• Convergent Evolution

• Coevolution

True/False: Humans evolved from chimpanzees

• True

• False

Answer explanation

FALSE. No present day organisms evolved from other present day organisms Instead, they share a common ancestor.