List of top Biology Questions

While isolating DNA from bacteria, which of the following enzymes is not used ?
The role of DNA ligase in the construction of a recombinant DNA molecule is
A food chain consists of
A fibrous root system is best adapted to perform which one of the following functions?
Inflorescence of Solanum nigrum is
Flowers arranged centrifugally around a receptacle constitute
Flat leaf-like cladodes occur in
Parallel venation is unicostate in
Petiole is flattened to form sickle shaped photosynthetic structure in Acacia longifolia which is called
Peduncle is reduced to a point in racemose inflorescence
Scorpioid branching is found in
Straggling rhizome with sympodial branching is
Floral buds are modified into tendrils in
In deliquenscent trees, the crown is
A dithecous anther consists of $(i)$ microsporangia, $(ii)$ in each lobe.
A dikaryon is formed when
Adventitive polyembryony occurs in
Moisture content of a mature seed is
Grain covering of Maize is formed of
In onion seed which is not differentiable
A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the above situation is
Tritegmic ovules occur in
Vegetative fertilization is characterised by
Outer multicellular solid and inner liquid endosperm occurs in
Scotopic vision is due to