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The TAAS, or Texas Assessment of Academic Skills, was the third standardized test used in Texas between 1991 and 2002, when it was replaced by the TAKS test from 2003 to 2013. [1] It was used from grades 3, 5, 7, 9, and 11. Passing the Grade 11 level was required for graduation, but many opportunities for retesting were available.
The official logo of the TAKS test. Mainly based on the TAAS test's logo. The Texas Assessment of Knowledge and Skills (TAKS) was the fourth Texas state standardized test previously used in grade 3-8 and grade 9-11 to assess students' attainment of reading, writing, math, science, and social studies skills required under Texas education standards. [1]
Test shape is highly variable among different foraminifera; they may be single-chambered (unilocular) or multi-chambered (multilocular). In multilocular forms, new chambers are added as the organism grows. A wide variety of test morphologies is found in both unilocular and multilocular forms, including spiraled, serial, and milioline, among others.
As of 2017 no definite xenophyophore fossils have been found. [106] Test-bearing foraminifera have an excellent fossil record throughout the Phanerozoic eon. The earliest known definite foraminifera appear in the fossil record towards the very end of the Ediacaran; these forms all have agglutinated tests and are unilocular.
The effectively unlimited supply of these fossil tests and the relatively high-precision age-control models available for cores has produced an exceptionally high-quality planktonic Foraminifera fossil record dating back to the mid-Jurassic, and presents an unparalleled record for scientists testing and documenting the evolutionary process. [77]
Patrik argued that the first three definitions reflected a "physical model" of archaeological evidence, where it is seen as the direct result of physical processes that operated in the past (like the fossil record); in contrast, definitions four and five follow a "textual model", where the archaeological record is seen as encoding cultural ...
Fossils of organisms' bodies are usually the most informative type of evidence. The most common types are wood, bones, and shells. [57] Fossilisation is a rare event, and most fossils are destroyed by erosion or metamorphism before they can be observed. Hence the fossil record is very incomplete, increasingly so further back in time.
Isotopic ratios can provide further information. Specifically, the δ 18 O record responds to changes in temperature and ice volume, and the δ 13 C record reflects a range of factors, which are often difficult to disentangle. Sea floor core sample labelled to identify the exact spot on the sea floor where the sample was taken.