Exam 14: The Origin and History of Life

The Cenozoic era consists of the:

The only living member of the genus Homo is Homo habilis.

To determine the sequence of Clint the chimpanzee's DNA,the tens of millions of DNA sequences were ____ to create a complete genome sequence.

Primitive reptiles first appeared during the:

A mass extinction perhaps caused by a large asteroid hitting Earth near the Yucatan peninsula occurred during the:

The swinging from one arm to the other with the body dangling below is:

The geologic time scale is divided into eons,eras,periods,and epochs defined by major geological or biological events.

Clues from geology and paleontology suggest that simple cells or their precursors arose about:

Scientists use mitochondrial DNA to track the migration of humans across the planet.After a group migrates away from their ancestral homeland,any mutations that occur are not mixed with those left in the ancestral population.Based on this,mitochondrial DNA samples taken from ____ would have the fewest unique mutations,representing the original and oldest DNA sequences.

It is thought that the first multicellular organisms arose about:

During the first 5-600 million years on Earth temperatures ranged from 500-1000°C,atmospheric pressure was 10 times current levels and the planet was bombarded with meteorites.How would these conditions favor the formation of biological molecules?

Chromosome 2 in Homo sapiens formed when two smaller chromosomes fused,after the chimpanzee and human lineages split.As a result,humans have 23 pairs of chromosomes and chimpanzees have 24 and can no longer form fertile offspring (Fig.14.31).This would allow humans and chimps to evolve independently while living in the same location also known as:

Which scientist,using meat placed in sealed containers and meat in open containers,helped disprove the theory of spontaneous generation?

How might multicellular organisms have arisen?

Humans and chimps are both:

Carl Woese named an ancient aggregate of DNA,RNA,proteins,and lipids a:

A buried skeletal find of a specimen has the foramen magnum tucked beneath the skull; this indicates that the skeletal remains are:

The coding region of chimpanzee genes and human genes are 99% identical.

The carbon dioxide released from burning coal or oil comes from which of the following?

Chloroplasts arose by endocytosis of ______.