Seminal plasma in human males is rich in

Match the columns.

Column $I$	Column $II$
$(a)$ Vas deferens	$(1)$ Duct that transports sperm from the epididymis to the urethra.
$(b)$ Spermatogenesis	$(2)$ Process of formation of spermatozoa from spermatogonia.
$(c)$ Prostate gland	$(3)$ $A$ gland surrounding the urethra that secretes seminal fluid.

Which gland contributes the most to the formation of semen?

If the testes of a male rabbit do not descend from the abdominal cavity into the scrotal sac,then .......

Match the structures/parts of the human male reproductive system in Column $I$ with their respective explanation in Column $II$ and select the correct answer from the given options.

Column $I$	Column $II$
$i$. Prepuce	$a$. Fibromuscular band that retains testis in scrotum.
$ii$. Penis	$b$. Primary male reproductive gonad.
$iii$. Testis	$c$. Loose fold of skin covering glans penis.
$iv$. Gubernaculum	$d$. Male copulatory organ.

What is the condition of the testes known as cryptorchidism?