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.
plastids. Since onion bulbs are below ground they do not get the light necessary for chloroplast development. There are lots of web sites available that have information on this subject. Try a google search using the words chloroplasts and onions or onion chloroplasts. If you are interested in learning more about cells, onions are a good experimental organism. Onion root tips are great to study mitosis and meiosis and the thin membranous epidermis between the onion rings are perfect for observing plasmolysis.