List of top Biology Questions

What is acrosomal reaction?
The H-zone in the skeletal muscle fibre is due to
The given figures are types of elements (A and B) which constitute one type of complex tissue (c) of a plant . Identify A, B and C.
The amphids are cuticular elevations on the ventrolateral lips of Ascaris. These are
Refer to the given figure of T.S. of penis. How will penile function be altered if the blood supply to the B is impaired?
Peyer's patches are present in
Oxyntic cells are located in
In frog, mesorchium is a thin fold of membrane extending between
Golgi apparatus is absent in
Glycosylation of proteins is done by
Eye spot is seen in
Diagrams of hypogynous, perigynous and epigynous flowers are given below. Find out the option that correctly exemplifies A, B, C and D.
Developing spermatozoa receive nutrition from
Transpiration occurs only when stomata are open. Transpiration occurs only through stomata.
Respiratory pathway is an amphibolic pathway. In respiration, there is breakdown of many substances (catabolism) and synthesis of many substances (anabolism) by respiratory intermediates.
Net primary productivity is gross primary productivity minus respiration. Secondary productivity is produced by heterotrophs.
Colpa aurea is a specialised pollinating agent of orchid Ophrys speculum. Male Colpa mistakes the Ophrys flower for female wasp to copulate with it.
Auerbach?? plexus controls the secretion of intestinal juice. Meissner?? plexus controls the peristalsis in alimentary canal.
Appetency is the formation of new structure or habit of the organism according to its need. Appetency is also called doctrine of desire.
Agrobacterium tumefaciens is popular in genetic engineering because this bacterium is associated with the roots of all cereal and pulse crops. A gene incorporated in the bacterial mesosome gets automatically transferred to the crop with which the bacterium is associated.
AIDS and hepatitis B are sexually transmitted diseases. There is no permanent cure for both of them.
A geneticist crossed two plants and got 50% tall and 50% dwarf progenies. This cross follows Mendelian law as one of the parent plant might be heterozygous.
Contraction of the cremaster muscle occurs because of
According to the accepted concept of hormone action, if receptor molecules are removed from target organs, then the target organ will
A patient of diabetes mellitus excretes glucose in urine even when he is kept on a carbohydrate free diet. It is because