The actively dividing cells, or meristems, control plant growth. Primary (apical) meristems, the dividing tissue at the tips of the roots, grow longer roots, and secondary meristems, the dividing tissue seen in the cross-sections, grow thicker roots.
The answer to the first question is a.
I'll say C, Science cannot answer difficult question...let me know.
In plants life cycle, the diploid stage is known as B. The sporophyte.
So following the octet rule, carbon atom can only form a maximum of 4 bonds because, by then, it will have 8 valence electrons.
