<h2>Archaea is the correct answer</h2>
Explanation:
- Archaea is the group of single celled organisms which has no apparent nucleus that is why it is considered prokaryote
- They thrive in extreme environmental conditions for example extreme pH,salinity and temperature
- Archaea were initially classified as bacteria but since the differences in their cell type and organization it was given a different class
- Archaea has a cell wall wall but no peptidoglycan whereas bacteria contains peptidoglycan so bacteria cannot be the option in given condition
- In the condition no apparent nucleus is given but algae have a prominent nucleus so it cannot be the given organism
- Viruses do not have a cell wall rather consists of cell coat so it cannot be the right option
The most of the primary production occur near the ocean surface. The answer is A. first 75 feet
The atria are chambers<span> in which </span>blood<span> enters the heart. They are located on the anterior end of the heart, with one atrium on each side. The right atrium </span>receives <span>deoxygenated </span>blood<span> from systemic circulation through the </span>superior vena cava<span> and</span>inferior venae cavae<span>.</span>