Exam 14: The Origin and History of Life

Mitochondria evolved before chloroplasts based on which observation?

Small animals called thecodonts and therapsids were the primary forms of animal life at the beginning of the:

The three groups in the primate lineage are:

Characteristics shared by primates include:

The three periods of the Mesozoic era are the Triassic,Jurassic,and Cretaceous.

The first amphibians appeared during the:

Which scientist is given credit for proposing the endosymbiont theory?

The first vertebrates to leave fossil evidence,jawless fishes appeared during this time:

Which of the following is not a similarity supporting the endosymbiont theory?

It is thought that the first cells probably arose about:

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 be an example of:

How is the ability of phospholipids to spontaneously form membranes when placed in water important in the origin of life on Earth?

Which scientist,using S-shaped curved open-necked flasks to keep out bacteria but allow air and the "vital principle" in,helped disprove the theory of spontaneous generation?

The "endosymbiotic theory" states that eukaryotic cells work together to form a multicellular organism.

Which theory is used to help explain the origin of chloroplasts and mitochondria?

The transcription factor FOXP2 has two mutations in humans that are not found in chimps.This transcription factor regulates the expression of genes that allow humans to speak.This is consistent with which hypothesis to account for the differences between humans and chimps?

It is thought that eukaryotes probably originated about:

According to the evolutionary tree humans are descended from other groups of modern apes.

Which of the following were found in the Cambrian seas?

The Mesozoic era lasted from about: