Based on these the basic organization of life was classified under 5 major divisions namely: Animalia, Plantea, Fungi, Protista and Monera. With the advent of new technologies and fossil records many scientists believe that kingdom Protista and Fungi cannot constitute a separate lineage as higher classes of organisms are believed to have evolved from these unicellular eukaryotes. Additionally the kingdom Monera which includes the prokaryotic life forms cannot be classified along with the others as there is a primary distinction between prokaryotes and the other eukaryotic organisms. The advent of sequencing has made the molecular sequences accessible which has in turn fuelled the need for a more formal taxonomical classification using the available molecular data. Hence these scientific breakthroughs have called for a new hierarchical system of classification.
Archeabacteria resemble eubacteria more closely on a molecular level. The evolution of photosynthetic eubacteria along with archea and possibly eukaryotes dates back to 3 to 4 billion years ago. Archeabacteria resemble prokaryotes in their cell cytology but on the molecular level they resemble eubacteria. However, with the exception of some differences the archeabacterial molecules bear a close resemblance to the eukaryotic counterparts.
The Bt gene discovered from the organism Bacillus thuringiensis, has the ability to destroy corn borers such as caterpillars by damaging their guts. Hence this gene was isolated from the bacterium and introduced into corn. Other similar genetically modified foods include tomatoes, rice and potatoes.
The monarch caterpillar eats leaves of milkweed which is present in roadsides and edges of fields. The present study revealed that these caterpillars died after munching the milkweed leaves which contained Bt corn pollen. However, in California the government has passed laws to protect the habitat of these monarch caterpillars due to the increasing threats