How is nitrogren 'fixed' into a useable form for plants? a through action of bacteria & lightning
b only through action of bacteria
c only through lightning
d photosynthesis

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

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.

Identify the examples in which sam interacts only with natural resources