The class mammalia contains the only animals that

Have mammary glands - GradPoint answer (you can do this)

The correct answer for the blank is-

The class mammalia contains the only animals that have mammary glands.

Explanation:

Mammalia is considered as class of  higher vertebrates (such as , marsupials, placentals, or monotremes) that provide nourishment to their offspring through mammary glands, which secrete milk.

They are warm blooded organisms and their skin is usually covered with more or less hairs.

Example- Human beings.

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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