Answer: Option D. -> Totipotency
:
D
Totipotency is the genetic potential of a plant cell to produce the entire plant. In other words, totipotency is the cell characteristic in which the potential for forming all the cell types in the adult organism is retained.
Cell cloning: The process of producing a group of cells that are genetically identical (clones) to a single ancestral cell.
Pluripotency : A pluripotent cell can create all cell types except for extra embryonic tissue.
Tissue culture is the invitro culture of plants.

Answer: Option A. -> Inland fisheries
:
A
Inland fisheries are ones in which fishing is done in freshwater bodies, such as lakes, ponds, rivers and tanks. Rohu, Catla and the common carp are some important freshwater fishes of India.

Answer: Option A. -> worker bees
:
A
Beeswax is a natural wax produced by honey bees of the genus Apis.Bees consume honey (6-8 pounds of honey is consumed to produce a pound of wax) causing the special wax-producing glands to convert the sugar into wax which is extruded through small pores. The wax appears as small flakes on the bees' abdomen. The wax is formed into "scales" by wax-producing glands of worker bees, who discard it at the hive.

Answer: Option C. -> A-3, B-4, C-1, D-2
:
C
Emasculation involves removal of stamens or killing of pollen grains of a flower without affecting in any waythe female reproductive organs. Thus, it makes possible the use of the bisexual flowers as female parents.
The process of hybridization aims to bring together combination breeding, transgressive breeding or hybrid varieties. The main aim of combination breeding is the transfer of one or more desired characters into a single variety from another variety.
Through clonal selection, disease free, high yielding clones may be selected, further evaluated and multiplied as a variety, thus, exploiting hybrid variety for many generations.
Pure line selection is the favorite method for the improvement of local self pollinating flowers that have considerable genetic variability.