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.