Questions

A ridge ine is a line formed along the highest points of a mountain ridge.

Irrigation canals are generally aligned along ridge lines.

The collections of entities of a particular Entity Type are grouped together into an entity set.

Eukaryotic cells all have a nucleus. Eukaryotes are organisms that are multicellular, although there are some examples of single cellular eukaryotes. So eukaryotic cells can be either cell with a nucleus or a eukaryotic organism's cell.

The most important feature to judge whether it has nucleus membrane.

And for other choices, they are the common features of eukaryote and prokaryote.

"Bacteria take DNA from their environment" is what best describes transformation in bacteria.

Clove the commonly used spice which is obtained from the flower buds of a tree in the family Myrtaceae, Syzygium aromaticum.