QUESTION 16 Unit 3 is titled "The Hearth Belt: North Africa and Asia" because all of the following "origins" can be placed within these regions EXCEPT: O a. agricultural products O b. major world religions O c. animal species d. several language families

QUESTION 2 The data from the fossil record and the human genome supports the idea that, (mark all that are correct) modern humans originated in Africa and spread to the rest of the world between 100 and 200 thousand years ago. modern humans were the first primate species to establish populations in the new world. modern humans are the only species on earth to use tools and language. there was limited interbreeding between modern humans (Homo sapiens) and neanderthals (Homo neanderthalensis). QUESTION 3 Use the phylogeny below to select the classification that is valid. opossums monito del monte marsupial mole bilby bandicoots numbat Click Save and Submit to save and submit. Click Save All Answers to save all answers.

QUESTION 11 The primary reason that polar bear populations are declining is because the higher temperatures resulting from climate change cause them to overheat due to their thick fur.  True  False

QUESTION 69 Prezygotic reproductive isolation can occur O a. during embryo development b. during fetal development C. after birth d. during meiosis e. during fertilization

QUESTION 49 The El Niño-Southern Oscillation is an interaction between the oceans and the atmosphere that affects the temperature of surface waters in the Atlantic Ocean.  True  False

QUESTION 41 The view that natural resources are important but not indispensable is held by ____.   a. ecological economists   b. neoclassical economists   c. Eastern European economists   d. environmental economists   e. classical economists

QUESTION 6 Several previous mass extinctions during the history of the earth were the result of either global warming or cooling. What was the major factor that caused global temperatures to change so dramatically hundreds of millions of years ago? O A Changing atmospheric carbon dioxide concentration O B. The phases of the moon OC. The burning of fossil fuels by humans OD.Changes in the length of the day QUESTION 7 The increase in the Earth's temperature during the Paleocene Thermal Maximum (PETM) and our current human-driven global warming were/are both being driven by increasing atmospheric carbon dioxide concentration. However, what is a major difference between these occurrences of global warming? O A. One was caused by the Greenhouse Effect while the other wasn't. O B. Plate tectonics OC. Global temperature is rising much more quickly today than it did during the PETM OD. The earth stopping spinning on its axis during the PETM

QUESTION 48 The abyssal zone of the ocean is characterized by ____.   a. abundant living organisms despite the lack of sunlight for photosynthesis   b. being warm and brightly lit   c. an abundance of plants, animals, and other species   d. having almost no living organisms   e. having high concentrations of dissolved oxygen

QUESTION 15 Why do cities in warm and dry climates tend to have more air pollution?   a. These locations are usually surrounded by mountains that trap the air pollution.   b. There are fewer natural pollution reduction factors such as precipitation and salty sea spray.   c. There are more chemical reactions that can happen in dry climates.   d. There are more automobiles in these areas.   e. There are more plants and trees that promote the formation of VOCs.

QUESTION 1 The first life on earth arose about ; the first eukaryotes appeared about O 3.5 million years ago; 1.8 million years ago 4.75 billion years ago; 3.5 billion years ago 2 billion years ago; 100,000 years ago 3.5 billion years ago; 1.8 billion years ago