List of top Biology Questions

During _________stage of meiosis I, crossing over take place.
Point out the odd combination from the following.
Aqueduct of Sylvius is found between
If the ? mode of differentiation of xylem is centrifugal, then it is
One of the major reasons for apoptosis is
Indefinite number of stamens are the characteristic of the family
Cambium ring consists of
Name the type of sclereids present in seed coat of the pulses.
Which-one of the following is a mismatch of blood pigment and.organism?
Which one of the following is responsible for causing skin cancer and mutation ?
_________ is known as Portuguese man of war.
Which of the follwing cannot be employed as a cloning vector ?
Apical dominance in higher plants is due to
Kary B. Mullis got Nobel prize for discovering
Spawning in fishes is induced by injecting the female with
If the vasa deferentia of man are surgically removed
It is a process of embryo formation from cell of nucellus, without undergoing meiosis
With increasing age, secretion of which of the following reduces to almost half ?
These processes are necessary for the complete development of male gametophyte from pollen mother cell
From which cells peripherial region of radicle is produced ?
Which of the following is true for the effect of steroid hormone ?
The structure of which of the following consists of a layer of single cell thickness ?
It is present in rod cells and useful in night vision
With respect to mode of excretion which type of organism bony fishes are ?
Which of the following is responsible for excretion of dilute urine ?