30. The sweeper tentacles of corals contain: a. Zooxanthellae
b. Stinging cells called nematocysts
c. Specialized spicules
d. Bad-tasting chemicals

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

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nb

explanation:

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for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .