MCQ
Nematoblasts of Hydra are
- ✓Sensory
- BComplicated
- CWith nematocyst apparatus
- DAll of the above
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$(i)$ presence of sickle - shaped $RBC$
$(ii)$ Blood not clot, non stop bleeding
$(iii)$ The heterozygous female transmit the disease to sons.
$(iv)$ Both heterozygous parents transmit the disease to offspring
| Column$-I$ | Column$-II$ |
| $(a)$. A vector of disease | $(i)$ Bombyx |
| $(b)$. A gregarious pest | $(ii)$ Limulus |
| $(c)$. A living fossil | $(iii)$ Locusta |
| $(d)$. An economically important insect | $(iv)$ Culex |
Width $-$ Length $-$ Thickness
Reason : No recessive individual are obtained in the monohybrid test cross.