History of Life on Earth

Concept: Plate Tectonics and Continental Drift

5m

Concept: Biogeography, Fossil Record, and Radiocarbon Dating

9m

Concept: Mass Extinctions and Adaptive Radiation

4m

Concept: Timeline of Life on Earth

8m

History of Life on Earth Additional Practice Problems

Which of the following is NOT a reason why fossils are especially significant in understanding the evolutionary history of insects?

A. They provide the only direct information on the ages of the lineages?

B. They reveal the pattern and timing of extinctions and radiations

C. They are quite common for insects relative to other groups.

D. They can assist in reconstructing the phylogeny of groups

E. They provide the only direct evidence of extinct lineages.

Watch Solution

When two continents collide a(n) _____ often forms.

a. chain of volcanic islands

b. ocean trench

c. mountain range

d. ocean ridge

Watch Solution

The study of the movement of the earth's crust is called _____.

a. paleontology

b. meteorology

c. plate tectonics

d. driftology

Watch Solution

The time period during which life arose and the first cells came into existence is the _____.

a. Jurassic

b. Carboniferous

c. Precambrian

d. Paleocene

Watch Solution

The primitive atmosphere had little if any _____.

a. water

b. free oxygen

c. carbon dioxide

d. nitrogen 

Watch Solution

Approximately how long ago did LIFE first evolve on earth

a. 4.5 billion years

b. 3.5 billion years

c. 1 billion years

d. 600 million years

e. 100,000 years

Watch Solution

The oldest fossils of eukaryotes have been estimated to be

a. 6000 years old

b. 8 billion years old

c. 4.5 billion years old

d. 1.5 billion years old

e. 1995 years old

Watch Solution

According to geochemists which of the following would have been the most unlikely condition on the primitive Earth?

a. atmospheric cooling

b. crust formation

c. gas cloud encircling the Earth

d. high levels of oxygen

e. water, carbon dioxide, and nitrogen among the early gases

Watch Solution