The organs which have no apparent utility in the present organisms but were functional in the ancestors are vestigial organs.

eg ; nictitating membrane as a remnant of third eyelid

It may be defined as the pressure under which water passes from the living cells of the root into the xylem. It is the pressure set up by the cortical cells of the root upon the liquid contents under fully turgid conditions forcing a quantity of it to flow into the xylem vessels and through them, upwards into the stem.

The phenomenon in which neither of the alleles is dominant over the other and the offspring exhibits a phenotype intermediate between the parents

eg; flower color in snapdragon

Genetic conservation is the conservation of biodiversity by cryopreservation,in gene banks,etc

C.

united into one bundle