Which of the following statements about adaptive radiation is correct?

Which of the following statements about adaptive radiation is correct?

Answer: Adaptive radiation occurs within a single lineage.

Which organisms are not examples of an adaptive radiation?

Which organisms are not examples of an adaptive radiation?

Answer: Mammals and reptiles in the post-dinosaur age

How long ago do scientists believe life first began on Earth?

How long ago do scientists believe life first began on Earth?

Answer: 3.7 billion years

What process produces Earth's atmospheric oxygen?

What process produces Earth's atmospheric oxygen?

Answer: photosynthesis

What evidence points to the date of the appearance of the first oxygen-producing organisms?

What evidence points to the date of the appearance of the first oxygen-producing organisms?

Answer: iron oxides in rock

Which of the following best describes the archaeans described in the video?

Which of the following best describes the archaeans described in the video?

Answer: They live in extreme habitats.

The red sedimentary rocks of Western Australia resulted from the combination of oxygen and _____.

The red sedimentary rocks of Western Australia resulted from the combination of oxygen and _____.

Answer: iron

Achaeans can tolerate which of the following extreme habitats?

Achaeans can tolerate which of the following extreme habitats?

Answer: near-boiling water, high pressure, very salty water, oxygen-free environments

Animals first appeared during the _____.

Animals first appeared during the _____.

Answer: Precambrian

The Cenozoic era began approximately _____ million years ago.

The Cenozoic era began approximately _____ million years ago.

Answer: 65

____ were the dominant vertebrate life form during the Mesozoic era.

____ were the dominant vertebrate life form during the Mesozoic era.

Answer: Dinosaurs

Most modern animal phyla evolved during the _____ era.

Most modern animal phyla evolved during the _____ era.

Answer: Paleozoic

Bony fish first evolved during the _____ .

Bony fish first evolved during the _____ .

Answer: Paleozoic

Life arose during the _____.

Life arose during the _____.

Answer: Precambrian

Flowering plants first appeared during the _____.

Flowering plants first appeared during the _____.

Answer: Mesozoic

The Mesozoic era began approximately _____ million years ago.

The Mesozoic era began approximately _____ million years ago.

Answer: 251

The Precambrian time began at least _____ million years ago.

The Precambrian time began at least _____ million years ago.

Answer: 4,600

Seed plants first appeared during the _____.

Seed plants first appeared during the _____.

Answer: Paleozoic

The first prokaryotic cells appeared during the _____.

The first prokaryotic cells appeared during the _____.

Answer: Precambrian

Reptiles first appeared during the _____ era.

Reptiles first appeared during the _____ era.

Answer: Paleozoic