Echinoderms, they are among the most common invertebrate animals in the marine environment of virtually any part of the world, among them we can find species such as sea cucumber , salmon and cod fish, they have chamois cloth like outer layer, then we have the Crinoids, another example of marine species with feather, popularly they are called sea lilies and feathery stars, they have a solid calcite skeleton; they were so abundant in the paleozoic seas that their remains formed large limestone thicknesses.
we know that
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therefore
<u>The answer is</u>
to convert millimeters into kilometers
Antoine should divide millimeters by 
B) They maintain balance in the cell.
That mix of hydrophobic and hydrophilic, in other words, the mix of repelling and attraction maintains the aqueous balance in a cell and it's exterior.
Hope it helped,
BioTeacher101
Answer:
Biosphere
Explanation:
It is not the atmosphere, because the atmosphere is made up of air. It is the biosphere because it is a plant.
