A scientist is studying the effect of nitrates, a group of chemicals, on the aquatic environment and the organisms that live within it, such as aquatic snails and fish. This scientist is a(n) . A)
entomologist
B)
chemist
C)
hydrologist
D)
oceanographer
E)
toxicologist

A scientist who studies water and its properties is a hydrologist.

Explanation:

A hydrologist is a scientist linked to the study of water, both surface and underground, detecting cleanliness or contamination and proposing alternatives for its cleaning and conservation.

A hydrologist's research on the properties of water, its location, distribution and circulation contributes to the maintenance of the environment.

The other options are not correct because:

    A)  Entomologist : a scientist who studies insects.

    B)  Chemist : a professional who studies the elements and chemical compounds and their properties.

    D)  Oceanographer : study both oceans and seas, and their relationship with the environment, the atmosphere and the land.

    E)  Toxicologist: study the effects of toxic or harmful substances on living beings and the environment.

enzyme speed up the reactions

videntify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.