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.
Both plant and animal cells are eukaryotic cells, i.e., they have complex structures but the structures of both types of cells have major differences. Animal cells do not have rigid cell walls like plant cells. This allows animal cells to form and adopt various shapes. A type of animal cell called the phagocytic cell can even absorb other structures. This ability is not inherent in plant cells. Further, unlike animal cells, plant cells have chloroplasts for the utilization of sunlight and this is what also gives plant cells their green color.