Why do some adults still struggle with acne?

Ais a group of individuals of the same that exist together in the same place at the same time

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.

All phases of matter may have a fixed mass