Which among the following statements are true for sexual reproduction in flowering plants?

Define the following processes of asexual reproduction:
$(a)$ Spore formation
$(b)$ Regeneration
$(c)$ Multiple fission

In which plant does vegetative propagation occur through leaves?

During adolescence,several changes occur in the human body. Mark one change associated with sexual maturation in boys.

$A$ feature of reproduction that is common to $Amoeba$,$Spirogyra$ and $Yeast$ is that

$(i)$ Some organisms have the capacity of reproducing by using a single parent. Such organisms have a simple body structure.
$(a)$ What is this method called?
$(b)$ Name any four types of this method.
$(c)$ Give two examples of organisms using this method for reproduction.
$(ii)$ Identify the method of reproduction used by $Spirogyra$ and $Rhizopus$.