Moon Rocks, Radiometric Dating, and Earth's History
This content explores the significance of moon rocks in determining the age of Earth, the types of rocks that can be dated using radiometric methods, how scientists have studied the first appearance of life on Earth, facts about Earth's fossil record and geologic forces, influences on related species distribution, and the current classification of living things on the evolutionary tree.
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Biology for a Changing World, 2e Clicker Questions Chapter 17
Why are moon rocks useful in determining the age of Earth? A. The moon is geologically inactive, so the original rocks are still present. B. The Earth s surface is geologically active, so most of the original rocks have been lost through geologic activities. C. Both A and B. D. None of the above.
What type of rock can be dated with radiometric methods? A. Rock formed from a volcanic eruption B. Rock formed from chunks of other rocks that were cemented together C. Rock formed from layers of mud D. Rock formed from layers of sand
How do scientists know how the first life appeared on Earth? A. Early cells have been found frozen in samples from the Moon B. The first cells fossilized well enough to let scientists study their structure C. They have conducted careful experiments to replicate conditions of the primordial soup and lightning strikes D. All of the above.
TRUE or FALSE? The fossil record shows that Earth s geography and climate have been stable over time. A. TRUE B. FALSE
TRUE or FALSE? The same geologic forces that resulted in the break-up of Pangaea are still active today and the current continents are still moving. A. TRUE B. FALSE
Which factor is not important in influencing the distribution of related species? A. Their evolutionary history B. Biogeography C. Convergent evolution D. Plate tectonics
How are living things currently grouped on the evolutionary tree? A. 2 categories: Animals and Plants B. 3 categories: Animals, Plants, & Protists C. 3 domains: Bacteria, Archaea, and Eukarya D. 5 kingdoms: Animalia, Plantae, Fungi, Protista, and Monera
Which species would be most closely related? A. Species that are in the same Genus B. Species that are in the same Phylum C. Species that are in the same Kingdom D. Species that are in the same Order
Which level of classification holds the last common ancestor of humans and fish? A. Kingdom Animalia B. Phylum Chordata C. Class Mammalia D. Humans and fish do not share a common ancestor
What level of classification would not include all of the species in this tree? A. They are all in the Kingdom Animalia alligator monkey human turtle dog B. They are all in the Class Reptilia C. They are all in the Phylum Chordata D. They are all in the Domain Eukarya
salamander alligator monkey human What point represents the root of this phylogenetic tree? turtle dog D A C B
Two species look very similar but do not have very similar DNA sequences. What is the most likely explanation? A. B. The DNA sequences are wrong. They are closely related even though their DNA sequences are different. The two species share similar characteristics due to convergent evolution. They probably share a recent common ancestor. C. D.
Wings and the ability to fly evolved in both birds and bats. What is the best explanation? A. Because birds and bats both have wings, they must be closely related to each other B. Similar characteristics, such as the ability to fly, can evolve independently in unrelated groups
Two species look very similar but do not have very similar DNA sequences. How would you categorize them on a phylogenetic tree? A. They should be categorized in groups with their closest relatives. B. They should be categorized in the same group because they share similar morphological traits. C. Because the morphological and genetic information are conflicting, they cannot be categorized. D. None of the above.
