<span>The rat was taught that when you press the bar you receive food. When the food ran out the rat was still pressing the bar however it wasn't be awarded. The rat then saw that there was no outcome to pressing the button therefore found it to be pointless.</span>
The larger the mass, the greater the gravitational pull. bigger planets have a greater gravitational pull so smaller planets get pulled in and start to orbit them.
Answer:
<h3>Sankey diagrams are a type of flow diagram in which the width of the arrows is proportional to the flow rate. The illustration shows a Sankey diagram that represents all the primary energy flows into a factory. </h3>
Explanation:
Answer:
Option (D).
Explanation:
Steroid hormones are derived from lipids. Testosterone and estrogen are the steroid hormones. These hormones can directly diffuse into the plasma membrane.
Steroid hormones after diffusing into the cell, binds with its receptor present in the cytoplasm. Hormone with its receptor enters inside the nucleus and results in the gene transcription.
Thus, the correct answer is option (D).