110. Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms, includes

a) Study of the conditions of fossilization

b) Electron spin resonance (ESR) and fossil DNA

c) Study of carbohydrates/proteins in rocks

d) Study of carbohydrates/proteins in fossils

Ans:c

111. What kind of evidence suggested that man is more closely related with chimpanzee than with other hominoid apes

a) Comparison of chromosomes morphology only

b) Evidence from fossil remains, and the fossil mitochondrial DNA alone

c) Evidence from DNA extracted from sex chromosomes, autosomes and mitochondria

d) Evidence from DNA from sex chromosomes only

Ans:d

112. Anthesis is a phenomenon which refers to

a) Formation of pollen

b) Development of anther

c) Opening of flower bud

d) Reception of pollen by stigma

Ans:c

113. One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower. Under which one of the following categories will you place this plant

a) Darkness neutral b) Day neutral

c) Short day d) Long day

Ans:c

114. Lead concentration in blood is considered alarming if it is

a) 30 b) 4 - 6

c) 10 d) 20

Ans:b

115. In which one of the following enzymes, is copper necessarily associated as an activator

a) Tryptophanase

b) Lactic dehydrogenase

c) Tyrosinase

d) Carbonic anhydrase

Ans:c

116. DNA fingerprinting refers to

a) Analysis of DNA samples using imprinting devices

b) Techniques used for molecular analysis of different specimens of DNA

c) Techniques used for identification of fingerprints of individuals

d) Molecular analysis of profiles of DNA samples

Ans:d

117. Flagella of prokaryotic and eukaryotic cells differ in

a) Location in cell and mode of functioning

b) Microtubular organisation and type of movement

c) Microtubular organisation and function

d) Type of movement and placement in cell

Ans:b

118. The animals with bilateral symmetry in young stage, and radial pentamerous symmetry in the adult stage, belong to the phylum

a) Mollusca b) Cnidaria

c) Echinodermata d) Annelida

Ans:c

119. In Arthropoda, head and thorax are often fused to form cephalothorax, but in which one of the following classes, is the body divided into head, thorax and abdomen

a) Myriapoda b) Crustacea

c) Arachnida and crustacea

d) Insecta

   Ans:d