List of top Biology Questions

Which has been excluded from protochordata ?
Which floral conditions are represented by the symbols $\oplus$ and $\%$ respectively ?
Which function of tapetum is correct?
Which element participates in photolysis of water, ionic balance maintenance and solute concentration?
Which element is related with Khaira disease of paddy & auxin synthesis?
Which classification can be called as ??exual system?
Which are the accessory excretory organs? I.liver II. lungs III. skin IV. sebaceous gland Choose the correct option.
Which animal is the symbol of W.W.F. (World Wildlife Fund)
Which among the following is correct during each cardiac cycle?
Which among the following has $23$ chromosomes?
Where among the following will you find pitcher plant ?
When the condition are dry, a grass leaf curls inward to minimise water loss due to presence of
When stamens are adnate to tepals it is known as
When an oak tree is kept in a poisonous solution, water rises to the top of the tree, although the tree is ready to take another supply of poisonous solution followed by uptake of even pure water. This shows that
When accessory whorls (calyx and corolla) are absent in a flower, it is called
When a plant undergoes senescence, the nutrients may be
When a plasmolysed cell is placed in water or hypotonic solution, what happens?
What would happen if human blood becomes acidic (low pH)
Wheat belongs to this order
What is true of natural methods of contraception?
What is true for "lactational amenorrhea"? (i) It means absence of menstruation. (ii) Ovulation does not occur during the lactational period. (iii) Chances of conception are almost nil upto six months following parturition. (iv) Side effects are almost nil. (v) Contraceptive efficiency reduces after the period of intense lactation. (vi) It is a natural method of contraception. (vii) It increases phagocytosis of sperms.
What is true for an ideal contraceptive ? I. It should be user-friendly. II. It should be easily available. III. It should be ineffective and reversible with least side effects. IV. It should be effective and reversible with least side effects. V. It should interfere with the sexual act of the user.
What is true about "Saheli"? (i) Developed at the $CDRI$, Lucknow (ii) Contains a steroidal preparation (iii) "Once-a-week" pill (iv) Many side effects (v) High contraceptive value (vi) Very few side effects (vii) Low contraceptive value
What is the total number of species present on earth as estimated by Robert May ?
What is the full form of IUDs?