Question
Heteromorphic alternation of generation is commonly found in
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| Chromosomes | Position of centromere |
| $(A)$ Metacentric | $(1)$ At the tip |
| $(B)$ Submetacentric | $(2)$ Almost near the tip |
| $(C)$ Acrocentric | $(3)$ At the middle |
| $(D)$ Telocentric | $(4)$ Slightly away from the middle |
$R$- Conifers have needle like leaves.
$I.$ 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?