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The Jackson ratio is calculated by taking the weight of the tortoise in grams and dividing it by the cube of the length of the tortoise's carapace in centimeters. [1] This is essentially a value of the density of the tortoise in g/cm 3. The optimal value for this ratio is 0.21 with a range of 0.18–0.22 being acceptable for hibernation.
Other universities follow a 5-Point Scale, wherein the highest grade is a 1.00 and the lowest is a 5.00 (failing mark). The lowest passing mark is actually a 3.00. Although usually not depicted, a grade of 4.00 is equivalent to a grade of incomplete. If the school does not use the grade point "4.00", it will use "INC" instead.
Grading in education is the application of standardized measurements to evaluate different levels of student achievement in a course. Grades can be expressed as letters (usually A to F), as a range (for example, 1 to 6), percentages, or as numbers out of a possible total (often out of 100).
The top grade, A, is given here for performance that exceeds the mean by more than 1.5 standard deviations, a B for performance between 0.5 and 1.5 standard deviations above the mean, and so on. [17] Regardless of the absolute performance of the students, the best score in the group receives a top grade and the worst score receives a failing grade.
Greek tortoise Temporal range: Pliocene–Holocene Pre๊ ๊ O S D C P T J K Pg N Possible Late Miocene record T. g. nabeulensis male in Tunisia Conservation status Vulnerable (IUCN 3.1) Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Reptilia Order: Testudines Suborder: Cryptodira Superfamily: Testudinoidea Family: Testudinidae Genus: Testudo Species: T ...
Sequence evolution at least in mtDNA is known to proceed much more slowly in some turtles and tortoises than in others; [5] the rate of the mitochondrial 12S rRNA gene in Testudo is probably a rather low 1.0–1.6% per million years (as this fits best the paleobiogeographical situation), limiting the resolution provided by molecular systematics.
The Russian tortoise (Testudo horsfieldii), also commonly known as the Afghan tortoise, the Central Asian tortoise, the four-clawed tortoise, the four-toed tortoise, Horsfield's tortoise, the Russian steppe tortoise, the Soviet Tortoise, and the steppe tortoise, [3] [4] is a threatened species of tortoise in the family Testudinidae.
This species of tortoise can be seen everywhere in Ban Kok, a village in Suan Mon sub-district, Mancha Khiri district about 50 km (31.1 mi) from Khon Kaen city in Isan (northeastern) Thailand. These tortoises habitually coexisted with the villagers with nothing to harm them for more than 200 years since the village was founded.