Botany - Animal Kingdom Question with Solution | TestHub
BotanyAnimal KingdomBasis of ClassificationEasy2 minPYQ_2020
BotanyEasysingle choice
Identify the labelled parts A to D in sections of (i) diploblastic and (ii) triploblastic organisations in animals.
| A | B | C | D | |
|---|---|---|---|---|
| (a) | Mesoglea | Ectoderm | Endoderm | Mesoderm |
| (b) | Endoderm | Mesoderm | Mesoglea | Ectoderm |
| (c) | Mesoderm | Mesoglea | Ectoderm | Endoderm |
| (d) | Ectoderm | Endoderm | Mesoglea | Mesoderm |
Options:
Answer:
D
Solution:
Animals in which the cells are arranged in two embryonic layers, an external ectoderm and an internal endoderm, are called diploblastic. An undifferentiated layer, mesoglea, is present in between the ectoderm and the endoderm.
Those animals in which the developing embryo has a third germinal layer, mesoderm, in between the ectoderm and endoderm, are called triploblastic animals (platyhelminthes to chordates).
Stream:NTA_ABHYAS_NEETSubject:BotanyTopic:Animal KingdomSubtopic:Basis of Classification
⏱ 2mℹ️ Source: PYQ_2020
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