Jeff Is 13 Years Old and He Has Recently Noticed

question 87

Multiple Choice

Jeff is 13 years old and he has recently noticed some remarkable changes in himself.Over the past few months his voice has started to change,growing deeper.He has begun to grow pubic hair,as well as the beginnings of a facial beard.He is also filling out,with his muscles developing rapidly.These changes in Jeff are probably due to the action of _____________.

• A)gonads
• B)thyroid gland
• C)pineal gland
• D)adrenal gland

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Definitions:

Combo Boxes

A graphical user interface element that combines a drop-down box with a text box, allowing the user to select an item from a list or type a value.

Option Group

A collection of options presented in user interfaces, where the user can select one (or sometimes multiple) options from the group.

Toggle Button

A graphical user interface element that allows the user to change a setting between two states, such as on and off.

Tab Control

A graphical user interface element that allows users to switch between different views or documents within the same window or space.