List of top Biology Questions

Specialized cells called heterocysts are present in:
Who first identified the transforming principle ?
In the diagram given above, some of the algae have been labelled as a, b, c, d and e. These algae are respectively identified as :
Pyruvic acid, the last product of glycolysis, is degraded to CO and H in
Exponential growth in plants can 'be expressed as :
Draw a labeled diagram of sperm.
Draw a standard ECG and explain the different segments in it.
Mention two strategies evolved to prevent self-pollination in flowers.
When water moves through a semipermeable membrane, which of the following is created ?
MAB stands for :
Which one of the following is not a gaseous biogeochemical cycle in the ecosystem?
Which of the following is an example of imbibition ?
Which of the following is an autoimmune disorder
Which of the following is cultivated through vegetative propagation?
Which of the following is an endangered species of India ?
Which of the following types of organisms occupies more than one trophic level in a pond ecosystem?
In history of biology, human genome project led to the development of :
Cut a transverse section of young stem of a plant from your school garden and observe it under the microscope. How would you ascertain whether it is a monocot stem or a dicot stem? Give reasons.
The nuclear structure observed by Henkings in 50% of the insect sperm after spermatogenesis was
What is a centromere? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.
Different parts of a leaf are modified into tendrils which help the plant in climbing up. Identify the type of tendril that is seen in .
Convention on Biodiversity came into force on:
The bulk movement of substances through the conducting or vascular tissues of plants is called:
What are the characteristic features of Euglenoids?
The middleman between blood and tissues is: