30. Acute (A) and chronic (C) toxicity refers to those toxins that: a. Have immediate and only 1 time effects (A) versus those that always have effects (C) b. Have lethal (A) versus sublethal effects (C) c. Have immediate effects (A) versus long-term effects (C) d. Have recently been found dangerous (A) versus those that have been around for a long time (C)
30. Acute (A) and chronic (C) toxicity refers to those toxins that:
a. Have immediate and only 1 time effects (A) versus those that always have effects (C)
b. Have lethal (A) versus sublethal effects (C)
c. Have immediate effects (A) versus long-term effects (C)
d. Have recently been found dangerous (A) versus those that have been around for a long time (C)
The Earth is made up of four spheres known as lithosphere, atmosphere, hydrosphere, and biosphere. All these spheres are interdependent and affect each other.
The atmosphere acts as a protective shield against the harmful ultraviolet rays of the Sun and also obstructs any incoming celestial body such as an asteroid or meteoroid. Ever since the formation of the atmosphere, it has been evolving by changing its chemical composition. The biosphere includes the living entities of the Earth. The various elements of the biosphere are plants, animals, human beings, and micro-organisms.
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