MCQ
What would be the change in the chromosome number, during $S-$phase?
- ✓No change
- BThe number of chromosome doubles
- CThe number of chromosome doubles only in case of diploid cell
- DThe number of chromosome doubles only in case of haploid cell
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$II.$ It comprises dead elements
$III.$ It comprises highly lignified cell wall
$IV.$ It is the peripheral part
$V.$ It is dark and tough
Which of the above property doesn't belongs to heart wood?
| Organisms | Characteristics |
| ($a$) Platyhelminthes | ($i$) Cylindrical body with no segmentation |
| ($b$) Echinoderms | ($ii$) Warm blooded animals with direct development |
| ($c$) Hemichordates | ($iii$) Bilateral symmetry with incomplete digestive system |
| ($d$) Aves | ($iv$) Radial symmetry with indirect development |
$R :$ These have aglomerular kidney $i.e.$, no filtration occurs and tubular secretion is the only way of excretion.