How do Organisms Reproduce Test - 9

In the testis, sperm form in the seminiferous tubules, but are stored in the epididymis where they mature. They move through the vas deferens and mix with secretions from the seminal vesicle and bulbourethral gland to form the semen. They enter the urethra at the base of the penis.

Typhoid is transmitted by direct contact with the infected person or through contaminated food and water.

Leydig cells release a class of hormones called androgens.

Cutting is a method of vegetative propagation used to grow roses 

 At the time of pollination, tube nucleus is present, i.e. the pollen grain is usually 3-celled (tube cell + two male gametes)

 Underground stem are modified plant structures that derive from stem tissue but exist under the soil surface

Placenta connects the fetus to the uterine wall to uptake nutrients.

In general, a woman's fertile window is the day of ovulation (usually 12 to 16 days before the cycle begins) and the five days preceding it

Oxytocin is secreted by the posterior pituitary gland at the time of parturation.

The flowers appear earlier in plant growing by vegetative propagation.