e her is ur answer INTRODUCTION:The end products of photosynthesis are Oxygen(O2),water and starch.So one of the end products is oxygen ,which is proved by this EXPERIMENT.AIM:To prove oxygen is evovled during photosynthesis in the presence of sunlight.APPARATUS:Beaker,water,test tube,hydrilla plant twigs,funnel and sunlightPRECAUTION:-Setup should be kept in sunlight-The level of water in the beaker should be over the level of stem of the inverted funnel-While removing testtube ,place your thumb NEAR mouth of testtube to prevent escape of gas(oxygen) evolved and remove gently.PROCEDURE:1)Place hydrilla plant twigs in a SHORT stemmed funnel and keep it in a beaker containing water.2)Invert a test tube FULL of water over the stem of the funnel3)Place the apparatus in the sun for at least 2-3 hours.4)After sometime observe the apparatusOBSERVATION:1)Gas bubbles i,e.,oxygen is produced at the end of test tube and remove the test tube gently.2)Test the gas in the testtube by inserting a glowing incense stick which would burst into flames.3)This SHOWS the presence of oxygen.RESULT:By this experiment, we proved that oxygen is produced during photosynthesis in the presence of sunlight.brainliest