D. single- and simple multi-celled organisms
Although more complex animals like invertebrates and multi-celled organisms began to appear, it was very late compared to the original, simpler organisms for which the Precambrian time is characterized by.
Answer:
Geothermal energy
Explanation:
The Yellowstone National Park is a wonderful park located in the United State, covering an area of about 3,500 square miles. This park is comprised of beautiful geological as well as hydrothermal wonders.
The old geyser found in this park is powered by the geothermal energy. This energy can be simply defined as the energy that is stored in the interior of the earth. This energy increases with the increasing depth and is basically used in the production of electricity.
Answer: D. Shipping technologies advanced immediately
Answer: D. decreasing populations
The limited water supplies, the depletion of natural aquifers and the evaporation levels that surprisingly exceed rainfall levels are some of the reasons for the water shortage in the Middle East. The decrease in their population has nothing to do with the water shortage in the Middle East.
Answer:
The implementation of new automobile-efficiency standards will result in less air pollution.
Explanation:
A is not correct because one of the purposes of these standards is that they reduce oil consumption.
B is not correct because these standards will enable the vehicles to drive more miles per gallon.
C is correct because having vehicles that spend less oil and drive larger distances with less will result in a reduction of air pollution.
D is not correct because the carbon dioxide emissions will reduce, not increase.
