MCQ
Basic principles of embryonic development were stated by
- ✓Von Baer
- BHaeckel
- CDarwin
- DWeismann
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$I.$ Charles Elton developed the concept of ecological pyramid
$II.$ After the name these pyramids are also called as Eltonian pyramids
$III.$ It is a graphical representation or pyramid shaped diagram which depicts the number of organisms, biomass and energy at each trophic level
Which of the statements given above are correct?