Answer:
D
Explanation:
Organic compounds are chemical compounds which usually contains one or more atoms of carbon, hydrogen, oxygen and sometimes nitrogen or sulphur. Carbon and hydrogen are the main element that is contained in most organic compounds.
Option A is wrong because calcium phosphate is not an organic compound, although all the other compounds in the option are organic compounds.
Option B is wrong because calcium chloride is not an organic compound
Option C is wrong also as calcium sulphate is not an organic compound
Option D is correct as all are organic compounds
Answer:
The carbons on either side of the double bond are pointed in the same direction
Answer:
Fossil B
Explanation:
Fossil B is older because it's later is at the bottom
Answer:
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Antibodies are produced by a type of white blood cell called a plasma cell.
