#Question id: 4972
#SCPH06 I Botany
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: 745
#SCPH05 I Biotechnology
The structure of RNA differs from that of DNA, as RNA contains:
#Question id: 119
#SCPH05 I Biotechnology
Tay-Sachs disease is the result of a genetic defect in the metabolism of:
#Question id: 4569
#I Life Science/ Life Sciences Group – I-V
Which of the following must exist in a population before natural selection can act upon that population?
#Question id: 10335
#SCPH05 I Biotechnology
plants can store high levels of nitrate, and they can translocate it from tissue to tissue without deleterious effect. Yet if livestock or humans consume plant material that is high in nitrate, they may suffer with,