In the process of transcription in Eukaryotes, the RNA polymerase I transcribe -

1. mRNA with additional processing, capping and tailing

2. tRNA, 5 S rRNA and snRNAs

3. rRNAs - 28 S, 18 S and 5.8 S

4. Precursor of mRNA, hnRNA

Non-membranous nucleoplasmic structures in the nucleus, are the sites for active synthesis of:

Bicarpellary ovary with obliquely placed septum is seen in:

1. Brassica

2. Aloe

3. Solanum

4. Sesbania

One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:

The contrasting characteristics generally in a pair used for identification of animals in Taxonomic Key are referred to as:

1. Lead

2. Couplet

3. Doublet

4. Alternate 

Mad cow disease in cattle is caused by an organism which has:

1. Inert crystalline

2. Abnormally folded protein

3. Free RNA without protein coat

4. Free DNA without protein coat

Male gametes are flagellated in:

Between which of the following, the relationship is not an example of commensalism?

Regeneration of damaged growing grass following grazing is largely due to:

In order to increase the yield of sugarcane crops, which of the following plant growth regulators should be sprayed?