The layer which separates velamen (A spongy tissue in epiphytic roots of some orchids for absorption of atmospheric moisture) from cortex is called
Epidermis
Epiblema
Exodermis
Endodermis
Bulb of Allium cepa $(Onion)$ is
A rootless angiosperm is
Amla belongs to family
$A$ : Androecium of Cucurbita is synandrous.
$R$ : Anthers as well as filaments of stamens are united throughout their whole length.