The nuclear changes that occur during cell division are collectively termed as :

1. Karyotype
2. Cytokinesis
3. Karyokinesis
4. Enterokinesis

The point of attachment between two sister chromatids of a chromosome is :

1. Centrosome
2. Chiasma
3. Centriole
4. Centromere

When a cell in solution shrinks and loses its shape, then the solution is :

1. Isotonic
2. Hypertonic
3. Hypotonic
4. Potable water

With increase in atmospheric humidity, the rate of transpiration will :

1. Increase slowly
2. Remain the same
3. Decrease
4. Increase rapidly