Multiple Choice QuestionsThe pyramid of energy-in a forest ecosystem is
always upright
always inverted
both (a) and (b)
none of the above
A.
always upright
In a forest ecosystem, the producers are large size trees which make the base of Pyramid. The herbivores such as fruit eating birds, deer, elephants etc. make the primary consumers and are less than primary producers. After that, the number goes down at each successive level.
Lichens are important in the studies on atmospheric pollution because they
can grow in polluted atmosphere
can readily multiply in polluted atmosphere
efficiently purify the atmosphere
are very sensitive to pollutants like sulphur dioxide
9: 3: 3: 1 ratio is modified to 9 : 7 ratio due to
complementary gene
epistatic gene
hypostatic gene
supplementary gene
The map distance between the genes A and B is 3 units, between B and C is 10 units and between C and A is 7 units. The order of the genes in a linkage map constructed on the above data would perhaps be
A, B, C
A, C, B
B, C, A
B, A, C
In the lactose operon of Escherichia coli what is the function of promoter
Binding of Gyrase enzyme
Binding of RNA polymerase
Codes for RNA polymerase
Processing of messenger RNA
One of the following is sex-influenced character
Appearance of beard
Baldness in male
Docile behaviour of female
Low BMR in female
Polymerase chain reaction is most useful in
DNA synthesis
DNA amplification
protein synthesis
amino acid synthesis
sprouting of potato can be prevented in storage by
maleic hydrazide
gibberellins
indole acetic acid
cytokinins
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