A) do not posses ducts
B) sometimes do not have ducts
C) pour their secretion into blood through ducts
D) always have ducts
Correct Answer: A
Solution :
There are two types of glands in the body of higher animals, the ductus or exocrine glands and ductless or endocrine glands. The endocrine glands secrete hormones in the circulating blood.
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