MCQ
During systole
- AAuricles and ventricles contract simultaneously
- ✓Auricles and ventricles contract separately
- COnly auricles contract
- DOnly ventricles contract
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| Column $I$ | Column $II$ |
| $A$. Centrioles |
$I$. Non-membrane bound organelle Which helps in cell division |
| $B$. Fimbriae |
$II$. Special structure of bacteria which help them to attach with rocks in |
| $C$. Endomembrane |
$III$. Includes those organelles system whose functions are coordinated |
| $D$. Mitochondria |
$IV$. Divide by fission and site of aerobic respiration |
| 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 |