What happened to marine invertebrates during the mass extinction that occurred at the end of the
Permian Period, and what caused it? What will be an ideal response?
After the Permian extinction, roughly 50% of all marine invertebrate families and about 90% of all
marine invertebrate species were extinct. Scientists think global warming caused the ocean to become
highly stratified. Since there was little or no circulation of oxygen-rich surface waters into the deep
ocean, deep-water organisms died out. Stagnant waters covered the shelf region, causing shallow water
organisms to die out. Widespread volcanism also added carbon dioxide into the atmosphere, causing
climatic instability and ecologic collapse.
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Of the four major world religions, the one which has experienced the most extensive worldwide dispersion is:
A) Buddhism B) Christianity C) Hinduism D) Islam
What is usually responsible for a harmful algal bloom?
A) Diatoms B) Viruses C) Cyanobactiera D) Dinoflagellates
Compare life expectancy at birth to GNI PPP among world countries
What will be an ideal response?
Which of the following is an example of the embryonic stage of the Wilson Cycle?
A) Atlantic Ocean B) East Africa C) Mediterranean Sea D) Pacific Ocean E) Red Sea