MCQ
Lack of menstruation is caused due to
- AStress
- BPoor health
- CPregnancy
- ✓All correct
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$(I)$ Body is circular in cross-section.
$(II)$ Parasite found in animals and plants.
$(III)$ Organ-system level of body organization.
$(IV)$ Incomplete digestive system.
$b$. Seahorse
$c$. Flying fish
$d$. Sawfish
$e$. Dogfish