In human males,the testes lie in the scrotum,because it helps in the

In which plant does vegetative propagation occur through the stem?

In $Rhizopus$,tubular thread-like structures bearing sporangia at their tips are called:

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

Why does bread mould grow profusely on a moist slice of bread rather than on a dry slice of bread?

$(a)$ Draw a sectional view of the human female reproductive system and label the parts where:
$(i)$ eggs develop.
$(ii)$ fertilization takes place.
$(iii)$ the fertilized egg gets implanted.
$(b)$ Describe,in brief,the changes the uterus undergoes:
$(i)$ to receive the zygote.
$(ii)$ if the zygote is not formed.