increase in pollen aperture number, suggesting that pollen apertures are under strong selection pressure. This trend can be observed by comparing the aperture patterns in basal angiosperms (including monocots) with those of eudicots. Different developmental strate-gies operate for pollen apertures in basal angiosperms
Reuse your fountain pen by refilling the ink. Use the method that is suitable for your type of pen. 1  Fill ink in a piston converter pen by removing the cap and barrel and then dipping the nib inside the ink bottle. 2  Lower the piston to remove the air inside. 3  When you pull up the piston, the ink will be sucked in.
Learn how to use the Pro Pen to write and draw on your Surface Pro or Surface Pro 2 touchscreen. Here are some ways you can use your Pro Pen: 1  Draw and take notes in apps. 2  Mark up Microsoft Office and Adobe Acrobat documents.3  Get artistic and draw something in Fresh Paint, a drawing app available in the Windows Store.4  Use the pen like a mouse. 5  Switch seamlessly between touch, pen, mouse, and keyboard.n apps that support pen pressure, applying pressure thickens the line. Pen button. Gives you quick access to right-click menus. Press and hold the button, touch the screen with the pen tip, then release the pen button. You can also press and hold the pen tip on the screen to bring up the right-click menu. Eraser.