<span><span>A correct statement regarding the usage of the microscope is that </span>you should always begin with the lowest power objective lens before going to the higher power, make sure that the lens will not touch the slide. There are instructions on how to properly use the microscope and handle them with care. </span>
A) 12 is the answer because sex cells have half as many chromosomes as the offspring will have, half from the mother, the other half from the father.
There are five questions which are related to the Drilling down into petroleum's impact on life on Earth.
1. C. Iran produces more oil than the United States.
RPR is referred to as the Reserve to Production Ratio which is measured in years. Higher RPR of Iran demonstrates that it has more extraction rate than United States.
2. B. Human learned how to extract and burn fuel.
The major shift in Carbon cycle is because fossils and fuels have been excessively used extracted and burned for fuel and energy.
4. A. Trees of the Amazon remove Carbon dioxide from the air.
Forests are essential because they help remove carbon dioxide from air. The existing forests of Amazon are absorbing carbon dioxide which results in moderate climate and reduced climate change.
5. A. Warming waters spark bleaching events. Along with the bleaching, the ocean is becoming more acidic.
The biggest threat to coral reefs is bleaching event. Warming the waters spark to bleaching events.
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