Which statement best describes hormones?
a.) hormones are only made of peptides.
b.) hormones travel attached to white blood cells.
c.) hormones travel through the bloodstream.
d.) hormones are secreted through ducts.

The correct answer is C) Hormones travel through the bloodstream.

Hormones are signaling molecules which are synthesized by endocrine glands and released into the blood stream so that they could reach the target organ where they need to show their effect. Chemically, hormones can be peptides or steroids. So, option A is partially correct. Option D is incorrect because hormones are not secreted through ducts. There are certain exocrine glands in our body which have ducts but those glands instead of secreting hormones secrete substances like sweat, mucous etc. Option C is also incorrect.

the cell theory states that all living things including animals, as well as plants, are made of cells.

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.