WorksheetBroad Patterns of Evolution Multiple Choice 1 if we

Worksheet-Broad Patterns of Evolution Multiple Choice 1. if we are analyzing the origin of new families, orders, etc. over time, we are studying a. microevolution b, mutation c. macroevolution d. natural selection e. anagenesis 2. The radioactive decay of carbon-14 can be used to determine a. relative dating. b. absolute dating. c. mutation rates. d. plate tectonics. e. extinction rates. 3. Fossils are found only in a. metamorphic rocks. b. ign rocks. eous c. sedimentary rocks. d, crystalline rocks. e. radioactive rocks. 4. A paleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive isotope potassium-40, which has a half life of 1.3billion years. The rock now contains 3mg of the isotope. About how old is the rock? a. 2.6 billion years b. 5.2 billion years c. 1.3 billion years d, 0.3 billion years e. 0.4 billion years 5. Because of continental drift, dinosaurs during the Jurassic Period were able to migrate freely from a. Africa to Europe. b. Antarctica to Asia. c. Australia to Asia. d. South America to North America. e. South America to Africa. 6. Australia, Antarctica, and South America represent fragments of a. Australasia. b. Laurasia. c. Gondwanaland. d. Eurasia. e. Amerasia.

Solution

1. a. Microevolution: It is defined as the evolutionary changes within a species or small group of organisms over a short period of time.

b. Mutation: It is the alteration the genetic material.

c. Macroevolution: It is defined as the major evolutionary changes especially with regard to the evolution of whole taxonomic groups over long periods of time.

d. Natural selection: The process whereby the organisms best adapt to the environment will survive.

e. Anagenesis is species formation without branching of evolutionary line of descent.

So, the correct answer is a.

2. The correct answer is option B. Absolute dating is a process of determining an age on a specified chronology in archaeology and zoology. The primary methods of absolute dating involves using the radioactive decay of elements trapped in rocks or minerals. Including isotope system from radioactive dating with C-14.

3. The correct answer is option C. Fossils are mostly found in sedimentary rocks such as limestone, shale and sandstone. Igneous and metamorphic rocks do not contain fossils due to the high temperatures and pressures involved in their formation.