Angiosperms have ovaries; gymnosperms do not.
If you have a second fixture around, you can use the same test of putting a tube in a working socket and see if it lights. It is not uncommon in fluorescent fixtures to have the ballast burn out. You may detect a burnt smell or see the bulbs flickering.
<em><u>A.SURFACE </u></em><em><u>RUNOFF</u></em><em><u> </u></em><em><u>FROM </u></em><em><u>RAIN.</u></em>
<em><u>C.MELTING</u></em><em><u> </u></em><em><u>ICE</u></em>
<em><u>B.OCEAN </u></em><em><u>CURRENTS </u></em><em><u>(</u></em><em><u> </u></em><em><u>I </u></em><em><u>guess?</u></em><em><u>)</u></em>
<em><u>[that's it]:)</u></em>
C!! i had this question before . energy decreases at top