Which of the following pairs of words are opposites?

lingu/o & gloss/o
erg/o & hypn/o
Ven/o & phleb/o
Pyret/o & Pyrex/o

Agene in a type of bacteria when the ses bacteria reproduce asexually this mutation can only be inherited by

Why do bacteria thrive even in hostile environments

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?