Which elements are most abundant in living organisms?
A) oxygen, nitrogen, carbon, hydrogen, sulfur, and phosphorus
B) carbon, potassium, iron, magnesium, hydrogen, and nitrogen
C) hydrogen, carbon, calcium, potassium, oxygen, and phosphorus
D) oxygen, calcium, phosphorus, sodium, hydrogen, and carbon
A) oxygen, nitrogen, carbon, hydrogen, sulfur, and phosphorus
B) carbon, potassium, iron, magnesium, hydrogen, and nitrogen
C) hydrogen, carbon, calcium, potassium, oxygen, and phosphorus
D) oxygen, calcium, phosphorus, sodium, hydrogen, and carbon
Answer & ExplanationAnswer: A) oxygen, nitrogen, carbon, hydrogen, sulfur, and phosphorus
Explanation:
Living organisms often contain trace amounts of several elements, but the most abundant ones are oxygen, carbon, hydrogen, nitrogen, calcium, sulphur and phosphorus.
A candidate key is a column, or set of columns, in a table that can uniquely identify any database record without referring to any other data. Each table may have one or more candidate keys, but one candidate key is unique, and it is called the primary key.
A) an increase in the price level will increase the demand for money, reduce interest rates, and decrease consumption and investment spending
B) an increase in the price level will increase the demand for money, increase interest rates, and decrease consumption and investment spending
C) a decrease in the supply of money will increase interest rates and reduce interest-sensitive consumption and investment spending
D) an increase in the price level will decrease the demand for money, reduce interest rates, and increase consumption and investment spending
A) an increase in the price level will increase the demand for money, reduce interest rates, and decrease consumption and investment spending
B) an increase in the price level will increase the demand for money, increase interest rates, and decrease consumption and investment spending
C) a decrease in the supply of money will increase interest rates and reduce interest-sensitive consumption and investment spending
D) an increase in the price level will decrease the demand for money, reduce interest rates, and increase consumption and investment spending
Answer & ExplanationAnswer: B) an increase in the price level will increase the demand for money, increase interest rates, and decrease consumption and investment spending
Explanation:
The interest-rate effect suggests that an increase in the price level will increase the demand for money, increase interest rates, and decrease consumption and investment spending.
The atmosphere is a mixture of several gases. Nitrogen is the most abundant gas in the atmoshere and oxygen is next to it. It is 78% in the atmosphere and 21% is oxygen. Remaining 1% is all other gases like argon, hydrogen, neon, etc...
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