A change that affects the body cell is not inherited. However, a change in the gamete is inherited. The effects of radiation at Hiroshima have been affecting generations.

Analyze the above statements and give your interpretation.

Sexually reproducing organisms produce offspring with marked, significant and visible variation. Asexually reproducing offspring show minor variations.

i) Do you agree with the above statements?

ii) Among the following organisms point out the asexually reproducing organism.

(Cockroach, Euglena, Earthworm and Bird)

Here are certain important hereditary jargons. Fill in the blanks by choosing a suitable one from the list given. (allele, variation, speciation, gene, allelomorphs)

i) __________ are the factors which form the physical basis of inheritance.

ii)__________ is the alternate forms of the same gene.

iii)__________ are the expressions of contrasting pair of alleles.

Sequentially arrange the different species of man from primitive to modern man.

(Neanderthal man, Homo habilis, Homo erectus, Homo sapiens)

Biotechnology, the modern science in biology, has helped in producing different types of products. One of the following groups does not have a product of biotechnology.

Pick out and give reasons.

i) enzymes, organic acids, steroids, vaccines

ii) vaccines, enzymes, antibiotics, inorganic acids

iii) antibiotics, hormones, steroids, vaccines

iv) steroids, enzymes, antibodies, vaccines