MCQ
In Pinus / gymnosperms, the haploid structure are:
- AMegaspore, endosperm and embryo.
- BMegaspore, pollen grain and endosperm.
- CMegaspore, integument and root.
- DPollen grain, leaf and root.
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| Column $I$ | Column $II$ |
| $(a)$ Apocarpous | $(i)$ Papaver |
| $(b)$ Syncarpous | $(ii)$ Michellia |
| $(c)$ Epiphyllous | $(iii)$ Cashew |
| $(d)$ Cotyledon | $(iv)$ Aloe |
$(i)$ Mouth opens into a short tubular pharynx, leading to a narrow tubular passage called oesophagus.
$(ii)$ Gizzard helps in grinding the food particles.
$(iii)$ A ring of $6-8$ blind tubules called hepatic or gastric caecae is present at the junction of foregut and midgut, which secrete digestive juice.
$(iv)$ At the junction of midgut and hindgut is present another ring of $100-150$ yellow coloured thin filamentous malphigian tubules which help in removal of excretory products from haemolymph.