6. Observe your slide at 40X, and then at 100X. 7. What I Observed: Make two illustrations of what you observed one at 40 X, the other a
100 X. In the higher power drawing, label the nucleus, the cell membrane, the cell wall,
and the cytoplasm. Use proper biological drawing techniques. Write one caption
describing your observations
40X Onion Cells
100x Onion Cells
liana

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this