Pls pls help...
Dear student
7. Both statements are true and reason is the correct explanation for assertion. Tobacco contains chemical substance called nicotine which stimulates adrenal gland to release adrenaline and nor-adrenaline into blood which results in increase of blood pressure and heart rate.
8. Both statements are true and reason is the correct explanation for assertion. Proto-oncogene are normal cellular genes that regulates cell growth and differentiation. Mutation in one of the two alleles of a proto-oncogene converts it to oncogene which induce transformation of cell.
Regards
7. Both statements are true and reason is the correct explanation for assertion. Tobacco contains chemical substance called nicotine which stimulates adrenal gland to release adrenaline and nor-adrenaline into blood which results in increase of blood pressure and heart rate.
8. Both statements are true and reason is the correct explanation for assertion. Proto-oncogene are normal cellular genes that regulates cell growth and differentiation. Mutation in one of the two alleles of a proto-oncogene converts it to oncogene which induce transformation of cell.
Regards