Endocrine glands ________.

A. Do not have ducts to carry their product to a surface
B. Do not have ducts to retain their product below surface
C. Have ducts that carry their secretory product to a surface
D. Have ducts to retain their secretory product below surface

What do you think?

I think B.

The correct answer is A. Endocrine glands do not have ducts to carry their product to a surface.

To explain how to arrive at this answer, let's break down the options:

A. Do not have ducts to carry their product to a surface: This statement correctly describes endocrine glands. Endocrine glands release their secretions, called hormones, directly into the bloodstream and do not use ducts to transport their products to a surface.

B. Do not have ducts to retain their product below surface: This option incorrectly implies that endocrine glands do not have a way to retain their product below the surface. However, in reality, endocrine glands release their secretions into the bloodstream rather than retaining them below the surface.

C. Have ducts that carry their secretory product to a surface: This statement is incorrect. It describes exocrine glands, which have ducts to transport their secretions to a surface, such as sweat glands and salivary glands.

D. Have ducts to retain their secretory product below surface: This option is incorrect as well. Endocrine glands do not have ducts to retain their secretory product below the surface. Instead, they release their secretions into the bloodstream.

Therefore, by process of elimination, the correct answer is A. Endocrine glands do not have ducts to carry their product to a surface.