Indiana is home to fossilized crinoids. These small, sea-dwelling invertebrates are vaguely reminiscent of starfish, and some species
of crinoid are still present on Earth today, but these animals were especially common in the world's oceans about 400 million years
ago. How is this information important to the theory of evolution?
C the presence of croons fossils

C) The presence of crinoid fossils in Indiana provides evidence that populations have changed over time.

Explanation:

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.