How does the "barrier method" give protection from STD's? -It helps the semen travel faster
-It removes vaginal fluid from the body
-it prevents semen from entering another's body
-it causes the blood to flow slower

Which term best describes a community in which people work mostly in factories? a.agricultural. b.hunting and gathering. c.domesticated. industrial.

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.