Which two characteristics describe all organisms in the domain Eukarya? A. Their cells are prokaryotic.
B. Their cell walls have peptidoglycan.
c. Their cells are eukaryotic.
D. Their cell walls lack peptidoglycan.

the answer to your question is b

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.