Answer:
to provide a barrier to the movement of substances in and out of the cell
Explanation:
Lipid molecules in the plasma membrane form a lipid bilayer which creates a semi-permeable barrier between the inside and the outside of the cell. Water and small molecules can cross the membrane. Other large molecules like ions cannot.
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D. It expands and contrasts
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Plants fertilized once per week with Super Plant Food Formula have been shown in testing to produce twice as much fruit as plants that are not.
Explanation:
A scientific claim out of the options is that plants fertilized once per week with Super Plant Food Formula have been shown in testing to produce twice as much fruit as plants that are not.
A scientific claim is usually drawn from the result of an experiment that follows the detailed scientific steps.
- In the last statement we see that word "testing ".
- This suggests that an experiment must have been conducted before the claim was made.
- To test a claim, a hypothesis is usually drawn out.
- From the hypothesis we can test an observation and answer questions using the data obtained in the experiment.
- Before the assertion was made, experiments have been conducted.
- The other options are claims that have not been tested.
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Experiment brainly.com/question/5096428
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