The incompatible reaction is found in obligate parasites, and is associated with hypersensitive response of the host triggered by certain unique molecules called 

#Question id: 3048

#Unit 2. Cellular Organization

 If a bacterium regenerates from an endospore that did not possess any of the plasmids that were contained in its original parent cell, the regenerated bacterium will probably

#Question id: 20326

#Unit 4. Cell Communication and Cell Signaling

#Question id: 14080

#Unit 1. Molecules and their Interaction Relevant to Biology

#Question id: 4972

#Unit 11. Evolution and Behavior

Fossils of Lystrosaurus, a dicynodont therapsid, are most common in parts of modern-day South America, South Africa, Madagascar, India, South Australia, and Antarctica. It apparently lived in arid regions, and was mostly herbivorous. It originated during the mid-Permian period, survived the Permian extinction, and dwindled by the late Triassic, though there is evidence of a relict population in Australia during the Cretaceous. The dicynodonts had two large tusks, extending down from their upper jaws; the tusks were not used for food gathering, and in some species were limited to males. Food was gathered using an otherwise toothless beak. Judging from the fossil record, these pig-sized organisms were the most common mammal-like reptiles of the Permian. Anatomically, what was true of Lystrosaurus?

#Question id: 20319

#Unit 4. Cell Communication and Cell Signaling