Close-up of a Petri dish with a sample of plants from a pond for research in the hands of a laboratory worker, top view, on a background of water - Stock Photo & Image

The scientist, in protective gloves and uniform, collects material from the water in a Petri dish

Close - up of a Petri dish, with grown plants, in the laboratory, the hands of a scientist planted in the environment

A water sample from the river. Hand in glove collects water in a test tube. ecology concept

A water sample from the river. Hand in glove collects water in a test tube. ecology concept

A man in a protective suit stands in a river and pours water from a test tube into it with a reagent to analyze the level of pollution

Scientist's hand, in a protective suit and gloves, pours liquid from a flask into a pond

A laboratory assistants hand in a rubber glove pours a blue reagent from a flask into a test tube with water to analyze the level

Hand in blue in a protective glove, pours liquid from a test tube into a riverbed

Hand scientist, in a protective suit and gloves, collects water in a glass tube for testing

A man crouched in a protective suit to take a sample of a plant from water into a Petri dish for laboratory research

A man in special protective clothing and a mask draws water from a river into a flask after discharges into the river, checking the river for environmental friendliness

Scientist in yellow protective vest, uniform and gloves, collects materials from water, tweezers Petri dish

Specialist in a protective suit, is measuring the instrument on the pond, close-up