What shows up in the geologic record coincident with the end of the heavy bombardment period 3.6 billion years ago?
A. The first appearance of microbial life
B. The first dinosaurs
C. The first plant life on land
D. The first volcanoes
Answer: A
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Transitional between rain forest and tropical steppes
From Table 29.1, the biome map, and the climate map, determine the terrestrial biome that best characterizes each of the following descriptions and write its name on the first line provided. On the second line, relate it to temperature and precipitation regimes and/or global pressure and wind belts outlined at the end of Section 1.
Why does biodiversity increase towards the Equator?
No one really knows why Warm wet climate promotes diversity The lack of predators increases diversity Most of Earth's land lies along the equator
In the middle latitudes of the Northern Hemisphere, the day with the shortest number of daylight hours occurs on ____
A) June 21 B) December 21 C) September 22 D) January 1
The H1N1 swine flu pandemic of 2009-2010 resulted in the immunization of millions of people. When the immunizations were first available, people under the age of 25 or over 65 were given priority. This was done because H1N1
A) was a hazard to people in these age groups, and only these people were vulnerable to infection. B) was most problematic for these age groups, who were most vulnerable to the hazard and thus at the greatest risk. C) was not a hazard to these people, but they were most vulnerable to infection. D) vaccines worked only on people in these age groups.