It is the past perfect.
Studied is the past tense of the verb study.
Charles Darwin studied the animals on the Galapagos Islands during his voyage on the HMS Beagle in the 1830s. His observations of the unique species on the islands contributed to the development of his theory of evolution by natural selection.
The Quarter and the Semester are different. During the standard school year from about September to about May, there are two Semesters but there are three Quarters. Classes given by colleges that use the Quarter system run for fewer weeks than classes given on the Semester system, but more classes are taken during an academic year.
In laboratory studies, nalidixic acid interferes with bone development in young animals. The drug's effects have not been studied in pregnant women, but because of its effects in animals, it is not recommended for use during pregnancy.
Migrate
Although they are very two different artists, they both studied archieture during their early days.
They have got different eye structure.
If you can not take the NSTP during the regular semester, you will need to speak to your counselor at your school. The student advisor can point you in the direction as to when you can take it.
Tesla then studied electrical engineering at the Austrian Polytechnic in Graz (1875). While there, he studied the uses of alternating current. Some sources say he received Baccalaureate degrees from the university at Graz. However, the university claims that he did not receive a degree and did not continue beyond the first semester of his third year, during which he stopped attending lectures.
There is no substantial proof or reasoning that would indicate animals behave different during plantary allignment.
No you can plan during your first semester and make your decision at the beginning of the second semester.
why university student should find the related jobs during the long semester break