20 Figure 11. A mobile antenna horizontal-plane pattern [13]Figure 12. Corner-reflector antennas light bar mounted on the roof ahead of theantenna. 5.3 Corner Reflector An antenna comprised of one or more dipoleelements in front of a corner reflector, calledthe corner-reflector antenna, is illustrated infigure 12.
Cheek cells, being animal cells, do not contain a cell wall as onion â¦ cells do becasue cell walls are found only in plant cells for structure and rigidness. Onion cells, unlike most plant cells, do not have chlorplasts becasue it does not need sunlight for photosynthesis as other plants do.
However, there are a few differences between plant and animal cells that set them apart. â¢ Both plant and animal cells have proper nuclei which has chromosomes to tell the cells exactly what they need to do. â¢ Both have mitochondria, cytoplasm and cell membrane. â¢ Animal cells do not have chloroplasts whereas plant cells have chloroplasts. â¢ An animal cell does not have a cell wall. A plant cell has a cell wall; it has cellulose wall to maintain fluid balance through osmosis. â¢ Plant cells contain one large vacuole enough to almost take up the entire cell space while animal cells contain smaller vacuoles inside the cells. â¢ An animal cell is either round or has an irregular shape.