List of top Biology Questions

Which is essential for the growth of root tip ?

When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt = rN(1-N/K) :

A process that makes important difference between $C_3$ and $C_4$ plants is

The primary producers of the deep-sea hydrothermal vent ecosystem are

The part of nephron involved in active reabsorption of sodium is

The ovule of an angiosperm is technically equivalent to -

The label of a herbarium sheet does not carry information on -

The chronological order of human evolution from early to the recent is

Spindle fibres attach on to

Specialised epidermal cells surrounding the guard cells are called -

Smooth muscles are

Radial symmetry is found in the flowers of -

Proximal end of the filament of stamen is attached to the :

Pollination in water hyacinth and water lily is brought about by the agency of -

Main component of the cell wall of fungi is

Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because

Lack of relaxation between successive stimuli in sustained muscle contraction is known as

Joint Forest Management Concept was introduced in India during :

In the stomach, gastric acid is secreted by the :

In mammals, which blood vessel would normally carry largest amount of urea?

In meiosis crossing over is initiated at :

In majority of angiosperms -

In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-typeoffspring. This indicates

Identify the correct statement on 'inhibin' -

How many plants among Indigofera, Sesbania , Salvia, Allium, Aloe, mustard, groundnut, radish, gram and turnip have stamens with different lengths in their flowers ?