amoeba
paramecium
euglena
Answer:
paramecium is the correct answer.
Explanation:
A common protozoan that moves by cilia is the paramecium.
paramecia are the single-celled organism, they live in the aquatic habitats.
The whole body of the protozoan is covered by cilia.
Cilia is hair-like organelles that help the paramecium to swim in the water as they have streamlined structure.
The function of cilia in the life cycle of a protozoan is it help in locomotion and in food ingestion.
Answer:
Groundwater protection must be a high priority in zones where contamination can easily enter the aquifer and affect a spring or pumping well used for the drinking water supply of a large population.
Explanation:
Groundwater protection has been addressed in most countries by issuance of different rules and regulations at national or local level that aim at preventing aquifer contamination. In this sense, laws have been issued to regulate the use and manufacture of toxic products, and set measures to manage the waste produced by industrial activities, and to properly place and maintain waste disposal and storage facilities (landfills, injection wells, storage tanks). Maximum allowable concentrations for some pollutants have been established, mainly in developed countries, to preserve a good quality of the groundwater exploited for drinking water supply. In addition, well-head protection areas and groundwater zone protection areas have also been defined in some developed countries to prevent pollution of drinking water sources.