1. Do you think there is life on other planets in our solar system? Explain your answer.
2. Which do you think is more likely: humans visiting an alien planet or aliens from another planet visiting us?
3. Do you think humans should try to set up a colony on Mars? Why or why not?
4. If humans moved to another planet or to a moon, what sort of special equipment would be necessary for survival?
5. If you had the opportunity to live on another planet, but you wouldn't be able to get back to Earth for 10 years, would you do it? Why or why not?

idk im sorry.

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.