List of top Biology Questions

Isolation of Bt gene from bacterium (Bacillus thuringiensis) was taken up in the year

International Rice Research Institute (IRRI) is located in

In females the hormone inhibin is secreted by

In chlorophyll structure four pyrrole rings are united with Mg by their atoms of

Environment Protection Act, to protect and improve the quality of our environment (air, water and soil) was passed in the year

The microtubules from opposite poles of spindle get attached to the kinetochores of sister chromatids in

One of the chief functions of smooth endoplasmic reticulum is

In the nymphal stage of cockroach the juvenile hormone is secreted by

Myelin of nerve fibres of central nervous system is produced and maintained by

Sexual reproduction in fungi may lead to formation of

The famous botanical garden of Kew is located in

Axoneme having 9 + 2 doublet microtubule arrangement is found in

In seven pairs of contrasting characters in pea plant studied by Mendel the number of flower based characters was

Which of the following provides most evident proof of evolution?

The vitamin which is essential for blood clotting is

The vacuole is lined by a membrane called

Synsacrum of fowl consists of about

In which form does the food transported in plants?

In Pheretima, septa are absent between which segments?

In Mollusca, eye is present over a stalk, called

In frog heart, there are cardiac muscles which consists of fibres called

If root of a flowering plant has $24$ chromosomes, then its gamete has how many chromosomes?

Contractile vacuole in protozoan Amoeba is meant for

Clamp connections are observed in

Chromosome complement with $2n - 1$ is called