MCQ
Protonema is:
- AHaploid and is found in mosses.
- BDiploid and is found in liverworts.
- ✓Diploid and is found in pteridophytes.
- DHaploid and is found in pteridophytes.
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$II.$ Cell enlargement
$III.$ New cell wall deposition
Which of the above are the characteristics of phase of elongation?
Choose the correct option accordingly
$(i)$ Arteries are thickwalled and have narrow lumen as compared to veins.
$(ii)$ Angina is acute chest pain when the blood circulation to the brain is reduced.
$(iii)$ Persons with blood group AB can donate blood to any person with any blood group under $ABO$ system.
$(iv)$ Calcium ions play a very important role in blood clotting.Which two of the above statements are correct?