An atomic number of an element tells you the number of protons in every atom of that element. The number of protons is generally the same as the number of electrons too.
The mass number is the number of protons and neutrons combined.
Hypertension is a complex trait with multiple environmental and genetic contributors. Linkage studies of rare Mendelian disorders of hypertension and hypotension have produced the most notable progress toward understanding the heritable basis of blood pressure. Association studies to identify common variants have been limited in the past by small sample sizes and most findings lack replication.<span>
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C.
Biotic mean alive, so we can cut off the first 2 easily. Aquatic birds eat frogs, so that one is safe for now. A decrease in something parasitic usually helps the population, so D is out too. The only one left is C.
Answer:
20
Explanation:
the body needs 20 amino acids to grow and function properly but only 9 are essential for the body
