MCQ
Proboscis gland is a/an
- AEndocrine organ
- ✓Excretory organ
- CFeeding organ
- DReproductive organ
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$\begin{array}{|l|l|} \hline Column\,\,-I & Column\,\,-II \\ \hline (a)\,\,Hinge\,\,joint & (1)\,\,Between\,\,atlas\,\,and\,\,axis \\ \hline (b)\,\,Pivot\,\,joints & (2)\,\,Humerus\,\,and\,\,wrist \\ \hline (c)\,\,Ball\,\,and\,\,rocket\,\,joint & (3)\,\,Knee\,\,joint \\ \hline (d)\,\,Gliding\,\,joint & (4)\,\,Shoulder \\ \hline \end{array}$
$(i)$ Mycoplasma has no cell wall.
$(ii)$ Mycoplasma is the smallest living organism known.
$(iii)$ Mycoplasma cannot survive without $O_{2}$.
$(iv)$ Mycoplasma are pathogenic in animals and plants.
| Organisms | Characteristics |
| ($a$) Platyhelminthes | ($i$) Cylindrical body with no segmentation |
| ($b$) Echinoderms | ($ii$) Warm blooded animals with direct development |
| ($c$) Hemichordates | ($iii$) Bilateral symmetry with incomplete digestive system |
| ($d$) Aves | ($iv$) Radial symmetry with indirect development |