MCQ
Phenetic classification of organisms is based on:
- ADendrogram based on DNA characteristics.
- BSexual characteristics.
- CObservable characteristics of existing organisms.
- DThe ancestral lineage of existing organisms.
Explanation:
In biology, phenetics is an attempt to classify organisms based on overall similarity, usually by morphology or other observable traits, regardless of their phylogeny or evolutionary relation.
It includes various forms of clustering and organisation.
Phenetic classification of organisms is based on measurable similarities and differences rather than genetic makeup and evolutionary descent.
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$(I)$ Malpighian corpuscles, $PCT$ and $DCT$ the nephron are situated in medulla of the kidney
$(II)$ The loop of henle dips into medulla.
$(III)$ In juxta medullary nephrons, the loop of henle is too short and extends very little into the medulla.
$(IV)$ Vasa recta is absent or highly reduced in cortical nephrons.