Questions

No. Boiling water is not a chemical change. Because in this process it doesn't loss its properties. It just changes its state i.e, from liquid state to gaseous.

Hence, Boiling water is a Physiacl change and not a chemical change.

Distributed systems work in a network. They can share the network resources, communicate with each other.

All India Kisan Sabha was founded in Lucknow in 1936. Swami Sahajanand Saraswati was elected as its first President.

Plants wilt due to excess of Transpiration.

As per the decision of the GST Council, e-Way Bill system has been rolled out from 1st of April this year (2018).

The given sentence is in simple past. No improvement required.

Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors.

a. Parvovirus B19 binds preferentially to the erythrocyte blood group P antigen on erythroid precursor cells.

Answers B, C, D are incorrect:

b. after entry the single-stranded viral DNA genome is transported to the cell nucleus where the host DNA polymerase synthesizes the complimentary DNA strand.

c. Parvovirus B19 infection can be diagnosed by direct detection of viral DNA not RNA.

d. the fetus of a seropositive mother is protected from infection by maternal circulating antibodies.