The rate of population growth has slowed since 1960, but the world’s population is still growing.  True  False

Question 29 Which of the following are threats to species diversity in an ecosystem? destruction of habitat climate change all answers (above and/or below) natural disaster introduction of exotic species

QUESTION 10 The change in a population's gene pool over time is known as OGenetic drift OGenetic bottlenecks OFounder effect OGenetic variation

QUESTION 25 Most of the temperate grasslands in the northern hemisphere have been converted to: Orchards for fruit production O Crop land for vegetable production O Crop land for grains Tree plantations for timber O Tree plantations for biomass QUESTION 26 Ecologists characterize species richness by the r/K selection theory. What are the traits of K selected populations? O A Live in a stable environment B. Have a high survival rate but few offspring OC Reproduce rapidly, early, with large numbers of offspring O D. A and B A and C Click Save and Submit to save and submit. Click Save All Answers to save all answers.

Question 10

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 6 When very few patches are occupied by a species, the overall colonization rate will be relatively This is because there are O low, very few colonizers to establish new metapopulations O low; very few open patches to colonize O high; very few colonizers to establish new metapopulations O low; very few open patches to colonize A Moving to another question will save this response. 12 米 对 17 tyo 2# $ & 2 3 4 5 7 8. 9 Q W Y A S F G H J K X V R N

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 49 Communities that lie at increasing elevations exhibit the same changes as seen in ecosystems that evolve over time in communities throughout different seasons across the United States from east to west in biomes at decreasing latitudes.

QUESTION 23 Imagine that a prairie habitat in Texas is converted into a cotton field. That prairie had originally contained five rare species that have now had their habitat severely reduced. The cotton produced in that field is sold in stores in Asia. In this example: O A. Asia is exporting its biodiversity footprint OB. There is neither an import or export of a biodiversity footprint occurring here O C. Asia is importing its biodiversity footprint QUE