Tow genes R and y are located very close on the chromosome linkage map on maize plant. When RRYY and rryy genotypes are hybridized, then F₂ segregation will show

• Higher number of the recombinant types

• Segregation with expected 9:3:3:1 ratio

• Segregation is 3:1 ratio

• Higher number of the parental types

Phage genome site on bacterial chromosome resulted in the structure

• Nucleic acid

• Heterocyst

• Prophage

• None of these

Overlapping region between two ecosystems is called

• Biome

• Ecotone

• Niche

• Photic zone

In a cola fired power plant, electrostatic precipitators are installed to control emission of

• SO₂

• NO_x

• SPM

• CO

Maximum green house gases are released by

• India

• Britain

• USA

• France

Rarely among angiosperms, the pollen grains influenced the endosperm. This is called as

• Meta xenia

• Nemec phenomenon

• Xenia

• Mesogamy

The dominant epistasis ratio is

• 9:3: 3:1

• 12:3:1

• 9:3:4

• 9:6:1

Select the correct statement from the one’s given below with respect to dihybrid cross.

• Tightly linked gene on the same chromosome show higher recombinations

• Genes for apart on same chromosomes show very few recombination

• Genes loosely linked on the same chromosomes show similar recombination as lightly linked ones

• Tightly linked genes on the same chromosomes show very few recombination

A lake with an inflow of domestic sewage rich in organic waste may result in

• Drying of the lake very soon due to algal bloom

• An increased production of fish due to lot of nutrients

• Death of fish due to lack of oxygen

• Increased population of the aquatic food web organisms

Choose the wrong pair

•  Cenchrus-Savanna

• Abies – Coniferous forest

• Quercus – Broadleaf forest

• Tectona – Temperate forest