Answer:
Eubacteria and Archaebacteria
Explanation:
Prokaryotes are single-celled organisms that do not have a nucleus
Eukaryotes are typically multicellular, but definitely do have a nucleus
Eubacteria and Archaebacteria DO NOT have nuclei
Fungi (think mushrooms) and Protists do have nuclei- and belong to the Eukaryote group- which means they DO have nuclei
The answer is A, the division of cells into two identical cells.
<span>Carbon dioxide is a colorless and odorless gas that is vital to life on Earth. This naturally occurring chemical compound is made up of a carbon atom covalently double bonded to two oxygen atoms. Carbon dioxide exists in Earth's atmosphere as a trace gas at a concentration of about 0.04 percent by volume. Natural sources include volcanoes, hot springs and geysers, and it is freed from carbonate rocks by dissolution in water and acids. Because carbon dioxide is soluble in water, it occurs naturally in groundwater, rivers and lakes, in ice caps and glaciers and also in seawater. It is present in deposits of petroleum and natural gas.</span>
Because the lung has two bronchi, it can still function if one bronchus is blocked by a foreign object. No gas exchange will happen to the affected side, and the other lung will compensate for the loss of air. The blocked portion though can become inflamed and can lead to infection and damage.
