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15
In aquatic plants like Pistia and Eichhornia, leaves and roots are found near ...........
Explanation

In Pistia and Eichhornia, in these floating plantes, the stem is like a runner where it branches to form leaves at the apex and roots below. The roots are found near the surface of water as both the plants are hydrophytes.

16
Reticulate and parallel venation are the characteristic of ............. and ............. respectively.
Explanation
Dicot and monocot plants All dicot plants have reticulate venation (i.e., veinlets forms network) except is Alocasia and Smilex, whereas all monocot plants have parallel venation (veins run parallel to each other within a lamina) with the exception Calophyllum.
17
Which parts in ginger and onion are edible?
Explanation
The edible part of ginger is the modified stem rhizome which stores food material whereas in onion the edible part is fleshy leaves. In this case, the internode becomes shortened, leaves get condensed to form a tunic and store food material.
18
In epigynous flower, ovary is situated below the ........... .
Explanation

In epigynous flower, ovary is situated below the thalamus (inferior) while the other whorls of flower like sepals, petals and androecium grows above the ovary (superior), e.g., carrot, guava, Cucurbita, sunflower, etc.

19

Add the missing floral organs of the given floral formula of Fabaceae.

Explanation

The floral formula of Fabaceae family is

Floral character of Fabaceae shows bisexual, zygomorphic, petals-five, gamosepalous, corolla-petals 5, consists of a posterior standard, two lateral wings, two anterior ones forming a keel, androecium, ten diadelphous, gynoecium-superior, ovary monocarpellay.