Answer: d. alternation of multicellular generations
Explanation:
The gametophytic as well as the sporophytic generations are alternative in the life cycle of the multicellular plants. This can be seen among the land plants. This feature cannot be seen in the algal species as they are unicellular in nature. Thus cannot be seen in the relatives of charophyta algae.
This is true, a covalent bond is always a shared pair of electrons between 2 atoms. This is done to stabilize both atoms but making their outer energy level more or totally complete with electrons.
