Asexual reproduction is the primary form of reproduction for single-celled organisms such as the archaebacteria, eubacteria, and protists.
reciprocate. 1  to give, feel, etc., in return. 2  to give and receive reciprocally; interchange: to reciprocate favors. 3  to cause to move alternately backward and forward. 4  to make a return, as for something given. 5  to make interchange. 6  to be correspondent. 7  to move alternately backward and forward.
the forced or strategic withdrawal of an army or an armed force before an enemy, or the withdrawing of a naval force from action. the act of withdrawing, as into safety or privacy; retirement; seclusion. a place of refuge, seclusion, or privacy: The library was his retreat. an asylum, as for the insane.