An onion or a daffodil reproduces by means of an underground structure called a bulb tuber rhizome
scientists use geological time to determine the age of landforms.
they used relative dating to divide earth's past in several chunks of time when similar organisms were on earth. later, scientists used absolute dating to determine the actual number of years ago that events happened. the geologic time scale is divided into eons, eras, periods, and epochs.
the major cells of the ground tissue are parenchyma cells, which function in photosynthesis and nutrient storage. they have thin walls, many chloroplasts, and large central vacuoles, and they form the mass of most leaves, stems, and roots. another cell of the ground substance is the sclerenchyma cell.
hope that ! sorry if its wrong