List of top Biology Questions

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 ?

Graves disease is caused due to

Gause's principle of competitive exclusion states that -

Free central placentation is found in -

Fertilization in humans is practically feasible only if -

Embryo with more than 16 blastgomeres formed due to in vitro fertilization is transferred into

Cotyledon of maize grain is called :

Conifers are adapted to tolerate extreme environmental conditions because of -

Blood pressure in the pulmonary artery is

Asthma may be attributed to :

Antivenom injection contains preformed antibodies while polio drops that are administered into the body contain -

A true breeding plant is -

A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F1 plants were selfed the resulting genotypes were in the ratio of -

A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called :