'Heterosis' is related to :

• cloning

• selection

• hybridization

• introduction

Living in same habitat organisms of same species from:

• biosphere

• community

• population

• niche

Which of the following constitute about 10-20% of total circular RNA?

• m-RNA

• r -RNA

• t-RNA

• hn -RNA

Jumping genes in maize were discovered by:

• Hugo de Vries

• T.H. Morgan

• Barbara McClintock

• Mendel

Innitiation codon is :

• AUG

• UUU

• UAG

• AAG

Which statement is incorrect ?

• Plant viruses contain RNA

• Animal viruses contain DNA

• T₄ contains double strand DNA

• TMV contains double stranded RNA

Pollination occuring from one flower to another of same plant is :

• autogamy

• allogamy

• geitenogamy

• none of these

Aleuron layer is found in :

• embryo

• nucellus

• endosperm

• endodermis

By anaerobic process, the cow dung is used to produce :

• methane

• butane

• ethane

• propane

Non-coding sequences of DNA are:

• exon

• intron

• rhizoids

• cistron