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Alex777 [14]
3 years ago
15

How many variables are tested in any controlled experiment?

Biology
2 answers:
igor_vitrenko [27]3 years ago
6 0
2 variables the independent variable and the dependent variable
Irina18 [472]3 years ago
3 0
There are 3 controlled variable
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3 years ago
When a sarcomere contracts and thin filaments move over thick filaments you would expect to see ________.
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the I bands to appear smaller

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I band is the lighter and a less dense area of the sarcomere. It contains no thick filaments. A Z disc passes through the center of each I band.  During muscle contraction myosin heads become attach to and slide along the thin filaments at both ends of a sarcomere. It pulls the thin filaments toward the M line and makes the thin filaments slide inward and meet at the center of a sarcomere. This inward movement of thin filament allows their ends to overlap.

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3 years ago
Phospholipids form the main fabric of the plasma membrane. one feature of phospholipids is that when they are placed in an aqueo
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The bilayer is structured in such a way that it complements the extracellular fluid around the cell as well as the cytoplasm within the cell. This is because the extracellular fluid is hydrophillic, the outside of the membrane protein is hydrophillic, the middle of the membrane protein is hydrophobic, the inside of the cell (the cytoplasm) is hydrophillic and the inside of the membrane protein is hydrophillic.
4 0
4 years ago
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7 0
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anygoal [31]

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Thus, options 2  and 4 which include identification and nomenclature are the correct options.

5 0
4 years ago
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