Which of the following is a male accessory reproductive gland?

Write true or false for the following statement: Menstruation lasts for about ten to fifteen days.

Which among the following statements are true for sexual reproduction in flowering plants?
$(i)$ It requires two types of gametes
$(ii)$ Fertilisation is a compulsory event
$(iii)$ It always results in formation of zygote
$(iv)$ Offspring formed are clones

Explain the term "Regeneration" as used in relation to reproduction of organisms. Describe briefly how regeneration is carried out in multicellular organisms like $Hydra$.

Differentiate between binary fission and multiple fission.

$A$ part of the male reproductive system is shown below. Study the diagram and answer the questions that follow.
$(a)$ Two parts have been incorrectly labelled. Identify them.
$(b)$ Give the function of urethra.
$(c)$ Which hormone is released by testis?