<h3><u>Answer;</u></h3>
Trench
<h3><u>Explanation;</u></h3>
- Oceanic trench is a deep canyon on the ocean floor that occurs where one tectonic plate subducts under another.
- Oceanic trench form where the old ocean crust from one tectonic plate is pushed beneath another plate, raising mountains, causing earthquakes, and forming volcanoes on the seafloor and on land.
- They are the deepest parts of the ocean floor.
Varible that remains constant are controlled varibles. Experiments have controlled varibles. Controlled varibles are quantities that a scientist want to remain constant and it must be carefully obsereve them as carefully as the dependent varibles.
The stem is most likely made up of vascular tissues. The main vessels present on vascular tissue are the xylem and phloem. These two tissues work as pipes for the transport of water and nutrients inside the stem. Xylem transports water and some nutrients from the roots. The Phloem <span>transports the soluble organic compounds that were produced during </span>photosynthesis from the leaves, and in the case of the cactus photosynthesis happens on the actual stem,<span> to the rest of the plant.</span>
Outbreak of diseases may cause by pathogens such as such as bacteria, viruses, fungi, and parasites. On the cell surface of these organisms proteins are present called antigens. On entering the antigen in the body, the immune system produce antibodies against antigen. It is better to test for disease antigens in sudden outbreaks because these antigens confirms the origin of the outbreak before the pathogen get destroyed by antibodies.