Which of the following is used as cellular support for cells and unicellular organisms? A) chloroplasts
B) lysosomes
C) endoplasmic reticulum
D) microtubules

D. Microtubules

Explanation:

Microtubules are made of proteins (largely) that make up a cell's cytoskeleton, which provides the internal support framework for the cell.

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.