Answer: The duodenum, jejunum, and ileum.
Explanation:
The jejunum is roughly 2.5 meters in length, contains plicae circulares (muscular flaps) and villi to absorb the products of digestion.
Primary succession, while secondary is caused by a natural disaster
Answer:
they are both caused by tectonic plates under the Earth's crust shifting
Explanation:
Answer:
Plants, algae, cyanobacteria, and etc.
Explanation:
<em>"Most </em><em>plants, most algae, and cyanobacteria perform photosynthesis</em><em>; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere, and supplies most of the energy necessary for life on Earth."</em>