The Question Below Refers to the Following Information Figure 451
-Which Combination of Gland and Hormone Would Be Linked

question 4

Multiple Choice

The question below refers to the following information.
In an experiment, rats' ovaries were removed immediately after impregnation and then the rats were divided into two groups. Treatments and results are summarized in the table below
$\begin{array}{lcc}\hline&\text { Group } 1 &\text { Group } 2\\\hline (\text { Daily injections of }&&\\\text { progesterone (milligrams) } & 0.25 & 2.0 \\\text { Percentage of rats that } & & \\\text { carried fetuses to birth } & 0 & 100\\\hline\end{array}$

Figure 45.1
-Which combination of gland and hormone would be linked to winter hibernation and spring reproduction in bears?

• A)pineal gland, melatonin
• B)hypothalamus gland, melatonin
• C)anterior pituitary gland, gonadotropin-releasing hormone
• D)pineal gland, estrogen
• E)posterior pituitary gland, thyroid-stimulating hormone

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