Unfortunately, no, you cannot toggle between ask and answer without using the mouse. The answer tab is a different Tab completely from the Ask tab, and the tabs are meant to be hit with a mouse. Since you are on a computer, it is expected you have a mouse that comes with it, and you are expected to use a mouse with WikiAnswers.
use shortcuts. you can work on the computers without mouse and cursor using those shortcuts.
Help
F1
simple you have a touch screen :D
Alt + tab
A mouse.
Holding the right mouse button will zoom in using the current weapon's scope or reticule. You can change it in the settings, whether you hold the button to zoom, or use a click to toggle it on or off.
Pressing the Command key (cmd) and the F key will toggle between Full screen and a window when using LiquidMac.
Describe two benefits of using a mouse
You can use the UPPER function.
You can stop scrolling with arrows by using the wheel on your mouse. The wheel is in between the right and left buttons on your mouse. If you don't have this kind of mouse you can get one for under $20. Another way to scroll without using arrows is by using the touch pad on your keyboard or by bringing up an on screen keyboard. (not all computers have these capabilities, check your specs before messing with any settings on your computers. If you don't know, how call your computer brand's customer service number and they should be happy to help you.)
In iOS, you must go into Settings>"Brightness and Wallpaper" and then toggle using the brightness slider. P.S. You can toggle this with Siri in iOS 7.