List of top Biology Questions

What is polymerase chain reaction (PCR)?
Give any four significances of fertilization in human.
Give any two functions of cerebellum.
Describe any three adaptations in anemophilous flowers.
Name the hormone which is responsible for apical dominance.
What is blood pressure?
Describe the steps in breathing.
What is a connecting link?
Explain three main functions of free antibodies produced by B-lymphocytes.
Give reason – Water acts as thermal buffer.
Draw a suitable diagram of replication of eukaryotic DNA and label any three parts.
What is spermatogenesis?
What is composition of bio-gas?
Define the terms:
i. Genetic drift
Differentiate between sympathetic and parasympathetic nervous system with reference to the following:
a. Pre and post ganglionic nerve fibres.
Draw a neat diagram of the conducting system of human heart and label AV node, Bundle of His, and Purkinje fibres.
What is biofortification?
Define – Incomplete Dominance.
Distinguish between heterochromatin and euchromatin with reference to staining property and activity.
Differentiate between X-chromosome and Y-chromosome with reference to –
i. Length of non-homologous regions
What is ex-situ conservation?
Define the terms:
a. Gross Primary Productivity
Give reason - ABA is also known as an antitranspirant.
Define – Imbibition

Identify 'A' in the given graph of population growth: