This is the 10199th most frequent Russian word.
биотехнологии
Biotechnology: the use of biological systems or organisms to develop or create products and technologies.
In this sentence, 'биотехнологии' is used as a plural noun representing the scientific field.
Современные биотехнологии активно развиваются.
Modern biotechnology is actively developing.
Here, 'биотехнологии' refers to specific applications of biotechnology in agriculture.
Эта ферма использует биотехнологии для увеличения урожайности.
This farm uses biotechnology to increase crop yields.
In this case, 'биотехнологий' is in the genitive plural form to indicate the subject area being studied.