Answer:
B
Explanation:
It has membrane-bound organelles. Mitochondria and chloroplasts are structures found in the eukaryotic cells.
Forests and other green plants uses carbon dioxide in photosynthesis thus lowering its amount in the atmosphere. In assumption, we can claim that in the ice ages, the low level temperatures may have caused the carbon dioxide levels to neutralize over these phenomenons, also to note that there were less oxygen-breathing organisms and higher carbon-dioxide dependent performing photosynthesis.
Answer:
C. amino acids.
Explanation:
Amino acids are organic molecules that combine to form proteins whereas a nucleotide is an organic compound that combines a sugar molecule and a phosphate . Phospolipids are fatty acids that also contain a phosphate molecule and lastly carbohydrates which are also known as saccharides are made up of Carbon , Hydrogen and Oxygen atoms .
Answer:
nitrogen that cannot be used
C is correct. the rest is either about food webs or about both food webs and food chains.
