MCQ
Hydra has
- AEndoskeleton
- ✓No endoskeleton
- CSometimes $(a) $ sometimes $(b)$
- DNone of these
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$(1)$ Frog is a poikilotherm.
$(2)$ Frog does not have any coronary circulation.
$(3)$ Heart is “myogenic” in nature.
$(4)$ Heart is autoexcitable.
| Column$-I$ | Column$-II$ |
| $(a)$ Pituitary gland | $(i)$ Grave's disease |
| $(b)$ Thyroid gland | $(ii)$ Diabetes mellitus |
| $(c)$ Adrenal gland | $(iii)$ Diabetes insipidus |
| $Z(d)$ Pancreas | $(iv)$ Addision's disease |
$(a)\quad(b)\quad(c)\quad(d)$