List of top Biology Questions

Taungya is practice of

Facultative reabsorption of water occurs in

Select the correct statement regarding an improved variety of transgenic basmati rice i.e., golden rice.

Sertoli cells are found in

The plasma membrane consists mainly of

Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct during this process of nitrogen fixation?

Stirred-tank bioreactors have been designed for

The nerve centres which control the body temperature and the urge for eating are in

Secretions from which one of the following are rich in fructose, calcium and some enzymes ?

Anticoagulant hirudin is obtained from genetically modified

Pulmonary trunk and aorta are attached by

Black (stem) rust of wheat is caused by

The principal nitrogenous excretory compound in humans is synthesised

Select the correct combination of the statements(a-d) regarding the characteristics of certain organisms : (i) Methanogens are archaebacteria which produce methane in marshy area (ii) Nostoc is a filamentous blue green alga which fixes atmospheric nitrogen (iii) Chemosynthetic autotrophic bacteria synthesize cellulose from glucose (iv) Mycoplasma lack a cell wall and can survive without oxygen. The correct statements are :

Vegetative propagation in mint occurs by

Valve surrounding opening of coronary sinus is

Coiling of garden pea tendrils around any support is an example of

The cavity contained in Graafian follicle is

Male and female gametophytes are independent and free-living in

Kranz anatomy is one of the characteristics of the leaves of

Which one of the following is not used in organic farming ?

Transport of food material in higher plants takes place through

In unilocular ovary with a single ovule the placentation is

Study the cycle shown below and select the . option which gives correct words for all the four blank A, B, C and D.

Keel is characteristic of the flowers of