What is the main setting of this story? special visitor?

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.

What do nitrifying bacteria convert

The activity of the modern sample is 1.10 bq . how long does that measurement take?