Answer:
exoskeleton
Explanation:
An exoskeleton is the hard outer covering that supports and protects some animals without backbones.
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Phosphorus is an important element for all forms of life. The phosphorus cycle differs from the other major biogeochemical cycles in that it does not include a gas phase; although small amounts of phosphoric acid (H3PO4) may make their way into the atmosphere, contributing—in some cases—to acid rain. The water, carbon, nitrogen and sulfur cycles all include at least one phase in which the element is in its gaseous state. Very little phosphorus circulates in the atmosphere because at Earth’s normal temperatures and pressures, phosphorus and its various compounds are not gases. The largest reservoir of phosphorus is in sedimentary rock.
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3. A boat is moved forward by a current
4. The micronucleus
5. Alternation of generations
6. A. They are eaten by some whales
7. B. Oxygen is removed from the ocean by decomposition
Answer:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
Explanation:
Role of tRNA in translation
tRNA is responsible for bringing amino acids to to developing chain amino acids on sequence of mRNA through ribosomes.
