List of top Biology Questions

Canal system in Porifera is not concerned with

Which of the following communicate by means of pheromones ?

Double fertilization was discovered by:

Carrot is micropropagated through

Endosperm of gymnosperms

The part which is grafting on stalk of another tree is called

Budding method of asexual reproduction is found in

Cartilaginous fishes belong to the class

To which of the following category dinosaurs belong ?

Phytol chain is present in

First stable product of C plants is

Skin is said to play an important role in excretion due to presence of

Bakanae disease was due to

Cyclin protein is required for cell cycle. Which other molecule is essential for completion of cell cycle ?

Stomata open in the daytime due to

Which of the following is a distinct character ?

One of the following is a distinct feature of birds

"Bt" toxin is

Which of the following statements is true ?

Which is the most distinct character of fishes ?

Blastula of frog is:

The outermost layer of exine of a pollen grain is made up of

Based on cellular mechanisms there are two major types of regeneration found in the animals. Which one of the following is the correct example of the type mentioned?

In humans, the gamete contributed by the male determines whether the child produced will be male or female. Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X$-chromosome and some on $Y$-chromosome.

Three of the following statements regarding cell organelles are correct while one is wrong. Which one is wrong?