MCQ
Pace maker of the heart is:
- AS.A. node
- BA.V. node
- CA .V. septum
- DL A. septum
Explanation:
S.A node called as pacemaker ,node of keith and flack heart , brain of heart ,pulsation centre.
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| | Column I | | Column II |
| A | Meristem | i. | Photosynthesis, storange |
| B | Parenchyma | ii. | Mechanical support |
| C | Collenchyma | iii. | Actively dividing cells |
| D | Sclernchyma | iv. | Stomata |
| E | Epidermal tissuse | v. | Sdereids |