The reason why the Southern California steelhead run sizes has decreased by 90% is the construction of dams along water sources.
<h3>What is a dam?</h3>
The dam is a large structure that serves the purpose of holding back water and making its level to rise quite high. Dams could be used for the purpose of electricity generation.
The reason why the Southern California steelhead run sizes has decreased by 90% is the construction of dams along water sources.
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Answer:
The first one is in metaphase
Explanation:
The cell membrane is composed by a lipidic bilayer. Phospholipids are most likely found in the membrane of a eukaryotic cell.
<h3>MEMBRANE COMPOSITION</h3>
The cell membrane is composed of
- glucans incrusted in between.
The membrane is mostly composed of phospholipids.
<h3>PHOSPHOLIPIDS</h3>
Phospholipids are amphipathic molecules.
They have hydrophilic heads facing the exterior and the interior of the cells and hydrophobic tails that arrange against each other in the interlayer space.
Lipids can easily change places with other lipids by lateral diffusion in the same layer.
They can diffuse transversally to the other layer but not as easily as lateral diffusion.
There are also other lipidic movements as rotational diffusion that imply the rotation of the molecule.
Phospholipids are most likely found in the membrane of a eukaryotic cell.
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Answer:
ecosystem
Explanation:
The level of organization shown in the example is "ecosystem" because the example represnts interaction between two different population with acorns on the land.
Ecosystem is defined as the interaction of groups of organisms in biological domain with abiotic enviornment.
The example, groups of organisms include "squirrels and birds" and abiotic enviornment include "acorns" or "nuts".
Hence, the correct option is "ecosystem".
