Which of the following is not a characteristic of animals (kingdom animalia)?

a)
they can be eukaryotic and multicellular.

b)
most are multicellular.

c)
some are autotrophs.

d)
some lack a backbone.

e)
some are eukaryotic and unicellular.

Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.

Energy stored in the bonds that hold together the atoms and molecules of all substances is called a. kinetic energy. b. electrical energy. c. mechanical energy. d. chemical energy.

What is characteristics of the troposphere