21. Rice can grow in water submerged soil because the plants

A. have spongy roots
B. can oxidize the micro-environment around their roots and thus able to absorb oxygen
C. are adapted to enable roots to ward off toxic products
D. all of the above

22. Who among the following coined the term Biotechnology?

A. Karl Ereky
B. James Clarke
C. Paul Terasaky
D. Clarke and Sommer