Why might two elements possess similar chemical properties?
a. they belong to the same group of the periodic table.
hey have the same physical state.
c. they have similar physical properties.
d. they belong to the same period of the periodic table.

A (they belong to the same group of the periodic table)

The answer is A because C doesn't have a causal relationship, D doesn't strongly effect most chemical properties, and chemical properties remain unchanged with state of matter.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

protist eukaryotes that are not plants, animals, or fungi ("misfits")