This is the 4338th most frequent Russian word.
биологический
Biological.
Here, 'биологический' is used as an adjective to describe research stemming from the field of biology or life sciences.
Биологические исследования помогают понять сложные механизмы жизни.
Biological research helps to understand the complex mechanisms of life.
In this sentence, 'биологический' qualifies products that are natural or organic in origin, emphasizing life-related properties.
Сейчас популярны биологические продукты для улучшения здоровья.
Nowadays, biological products are popular for improving health.
'Биологический' here is used to describe processes that are fundamental and inherent to living organisms.