Gases found in primitive atmosphere are
CH4, NH3, H2, H2O (vapour form)
CH4, NH3, CO2, H2O
CH4, H2O, CO2
CH4, O2, CO2
Sertoli cells are found in testis. These cells are
nurse cells
reproductive cells
receptor cells
None of the above
Species can be identified on the basis of
interbreed
species diversity
reproductive isolation
None of the above
C.
reproductive isolation
The prevention of inbreeding between the populations of two different species is known as reproductive isolation. It leads to the origin of new species.
Covered smut of barley is caused by
Ustilago hordei
Tilletia caries
Ustilago nudo
Colletotrichum falcatum
Ozone depletion in stratosphere would result in
forest fires
global warming
skin cancer incidence
None of the above
1 : 2 : 1 phenotypic and genotypic ratio is found in
complementary genes
blending inheritance
multiple alleles
pseudo alleles
The back bone of RNA consists of which of the following sugar?
Deoxyribose
Ribose
Sucrose
Maltose