- AHugo de Vries
- BGregor Mendel
- CLamarck
- DKolreuter
Explanation:
At the starting of the twentieth century, Dutch Botanist and geneticist Hugo de Vries proposed the mutation theory. According to this theory, living organisms can develop changes to their genes that greatly affect the organisms. These changes are passed down to next generation and result in the formation of new species.
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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?