Problem 1. Scientists can use __________ to determine the age of an igneous rock

Question

Problem 1. Scientists can use __________ to determine the age of an igneous rock surrounding a fossil.

a. radiometric dating

b. radioactive wavelengths

c. sedimentary rock layers

d. a microscope

e. the Miller- Urey experiment

Problem 2. The Miller-Urey experiment was important because it showed __________.

a. exactly how life began on the Earth

b. when life first began on the Earth

c. that is was possible to form organic molecules from inorganic molecules

d. a and c

e. all of the above

Problem 3. The evidence that scientists currently have suggests that life on Earth __________.

a. began in the water

b. first evolved around 3,500 million years ago

c. began as single-celled organisms

d. a and b

e. all of the above

Problem 4. The evolutionary history of an organism is called its _______.

a. taxonomy

b. systematics

c. ontogeny

d. phylogeny

e. adaptability

Problem 5. The biogeography of a species can help explain all of the following EXCEPT:

a. how organisms originally came to populate a specific region.

b. how two geographically isolated species can share a common ancestor.

c. why a species is confined to some parts of the world, even though other areas have suitable habitats.

d. a and b

e. All of the above can be determined from studying the biogeography of a species.

Problem 6. Which of the following factors might affect the physical distribution of a particular species?

a. plate tectonics

b. natural selection

c. genetic drift

d. b and c

e. all of the above

Problem 7. The first eukaryotic organisms on Earth were _______.

a. jelly fish

b. amphibians

c. Tiktaaliks

d. humans

e. green algae

Problem 8. According to scientists, approximately _______ species exist on Earth today.

a. 5–30 million

b. 1.8 million

c. 30 billion

d. 5–30 billion

e. 10,000

Problem 9. An animal with a rigid backbone would belong to which phylum?

a. genus

b. mammalian

c. primates

d. species

e. chordata

Problem 10. On a phylogenetic tree, the _______ represents the most recent common ancestor shared by the organisms above it.

a. branch

b. node

c. leg

d. root

e. bird

Explanation / Answer

Problem 1. A) radiometric dating

Radiometric dating is used to assess the age of rocks/fossils by monitoring the rate of decay of radioactive elements embedded in the rocks when they were formed.

Problem 2. C) that it was possible to form organic molecules from inorganic molecules.

Problem 3. E) all of the above.

Problem 4. D) phylogeny

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