List of top Biology Questions

Closing layers of lenticels may show the deposition of
Egg of frog is
Jute fibres are anatomically ............
The older resin clogged secondary xylem in the central part of the tree trunk and the younger outer secondary xylem which conducts water are __ and __ respectively.
Apocarpous gynoecium and rattle shaped stigma .are characteristic features of which family?
The phyllotaxy is of decussate type in
Albuminous cells are found in .........
Which one is the first heart sound ?
In which layer of the wall of alimentary canal, secretory glands are present ?
Which of the following element is important to maintain structure of immunoglobulin ?
Which of the following plants develop characters of xerophytes ?
Why sometimes, even diploid offspring is produced through Parthenogenesis ?
Which of the following has a role of sertoli cells in spermatogenesis ?
Which of the following takes part in formation of placenta ?
Find out odd one from the following options by considering its role in nitrogen cycle.
Which of the following is correct for lens focussing while seeing distant object ?
Structurally, what are olfactory nerve cells ?
It helps in differentiation of cells of the immune system
Through which process, starch of the guard cell is converted into PEP ions ?
In thistle funnel experiment, what will occur if sugar solution is added to beaker, after the process of osmosis stops ?
Which of the following is the most primitive ancestor of man ?
Which hormone promotes cell division, protein synthesis and bone growth ?
Which of the following ecological pyramids can never occur in inverted form ?
The important function of lymph is to
Cardiac output is determined by