Sympatric speciation occurs where populations are geographically isolated and gene flow between the populations does not take place.
a. true
b. false
Answer: b. false
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Notice that the concentration of CO2 in the atmosphere reaches its highest point at the same time each year. What explains the timing of the annual fluctuation in CO2? (Hint: Think about the process of photosynthesis and plant respiration, and the locations of large forests on Earth.)
The question is based on Figures 24-8 and 24-9, charts showing the change in atmospheric carbon dioxide measured at the Mauna Loa Observatory in Hawai‘i, from 1958 to April 2016.
What will be an ideal response?
The Democratic Republic of Congo, Congo, Burundi, Chad, and Rwanda rely on links to the rest of the world via
A. the Nile River C. the Tanzam Railway D. Saharan caravan routes
What is a storm surge?
A) Severe flooding due to rapid rainfall B) Higher than normal tides C) Movement of water due to the low atmospheric pressure creates a dome of water D) Movement of water due to the high atmospheric pressure creates a dome of water
A semiarid climate represents a transition zone that surrounds a desert and separates it from the bordering humid climates
Indicate whether the statement is true or false