Explanation:
Lichen is the best species to determine the pollution of air. They are highly sensitive to pollution and will barely be found growing on trees or rock in regions where the air has been polluted.
Worms are also a good indicators of pollution in the soil. Polluted soils will have very few to no worms.
Small invertebrates like the Caddisfly are used to determine pollution of water. They are very sensitive to water pollution and cannot be found in polluted waters. In addition toads and frogs are rare in polluted waters and air.
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Answer:
Option 3
Nephron -> Ureter -> Urinary Bladder -> Urethra
Answer:
Mostly spikes, which protruded out of the dinosaurs' skin and provided certain benefits to different types of dinosaurs: most notably Stegosauruses, which use their spikes to differentiate the temperature between the two sides of their bodies to tell which side the sun is on.
Explanation:
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