Thermococcus, Methanococcus and Methanobacterium emplify

• archaebacteria that contain protein homologous to eukaryotic core histones

• archaebacteria that lack any histones resembling those found in eukaryotes but DNA is negatively supercoiled

• bacteria whose DNA is relaxed or positively supercoiled but which have cytoskeleton as well as mitochondria

• bacteria whose DNA is relaxed or positively supercoiled but which have cytoskeleton as well as mitochondria

Which pair of the following belongs to Basidiomycetes?

• Birds nest fungi and Pufballs

• Pufballs and Calviceps

• Peziza and Stink horns

• Peziza and Stink horns

Thorn of Bougainvillea and tendril of Cucurbita are examples of 

• analogous organs

• homologous organs

• vestigial organs

• vestigial organs

A genetically engineered micro-organism use successfully in bioremediation of oil spills is a species of

• Pseudomonas

• Trichoderma

• Xanthomonas

• Xanthomonas

Ergot of rye is caused by a species of

• Phytophthora

• Uncinula

• Ustilago

• Ustilago

Which of the following is a slime mould?

• Rhizopus

• Physarum

• Thiobacillus

• Thiobacillus

Endosperm is consumed by developing embryo in the seed of 

• coconut

• castor

• pea

• pea

Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

• Bacterial leaf blight of rice

• Downy mildew of grapes

• Loose smut of wheat

• Loose smut of wheat

Replum is present in the ovary of flower of 

• lemon

• Mustard

• Sunflower

• Sunflower

In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statement is true about archaea? 

• Archaea resemble eukarya in all respects

• Archaea have some novel features that are absent in other prokaryotes and eukaryotes

• Archaea completely differ from both prokaryotes and eukaryotes

• Archaea completely differ from both prokaryotes and eukaryotes