The answer is D, Because dinosaurs appears in the Triassic period while insects appeared in the Devonian period which is about 160 million years about, which rules out A and B. Humans have been on Earth for almost 3 million years, which is nothing compared to the history of life in earth, which about 4,000 million years of life history, so D
Answer:
A. A glycerol head with 3 fatty acid tails
Explanation:
One glycerol attached to 3 fatty acids each
When a biologist counts the number of zebras in a population each year and notices an increase in the zebra population, this would be an example "of <span>observation"</span>
Hydroelectric Power
The benefits are: <span><span>
1. </span>Hydroelectric power is mainly a renewable source of energy. It relies on the stream cycle of water which do not cause pollution.</span>
<span><span>2. </span>Hydroelectric power also helps and promote water reservoir and storage.</span>
The cost are:
<span><span>1. </span>0.85 cents per kWh is the average cost in the US.</span><span><span>
2. </span>Conventional installation costs $1,000-$5,000</span>
Geothermal Power
The benefits are: <span><span>
1. </span>There is no pollution</span><span><span>
2. </span>We lessen the utilization of fossil fuels</span>
The costs are: <span><span>
1. </span>$0.03<span> to $0.035 per kWh is the cost of electricity by The Geysers.</span></span>
<span><span>2. </span> <span>$20,000 to $25,000 costs to build this power plant
Hope this helps.</span></span>
