Match following columns.
Column $- I$ | Column $- II$ |
$(a)$ Cross breeding | $(x)$ Jaya, Ratna |
$(b)$ Interspecific hybridization | $(y)$ Saccharum barberi |
$(c)$ Better - yielding semi - dwarf varieties | $(z)$ Hirsadale |
$(d)$ South Indian variety of sugar cane | $(w)$ Mule |
$(v)$ Saccharum officinarum |
$a-x, b-z, c-y, d-v$
$a-z, b-w, c-x, d-v$
$a-z, b-w, c-x, d-y$
$a-x, b-y, c-z, d-w$
Parasexual hybridization means
Poultry diseases include
Inbreeding depression is
Assertion : Use of fertilizers greatly enhances crop productivity.
Reason : Irrigation is very important in increasing crop productivity.
Assertion : Cattle breeds can be improved by super ovulation and embryo transplantation.
Reason : Superovulation in high milk-yielding cows is induced by hormonal injection