List of top Biology Questions

Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to
The brainstem is made up of................
Animals which possess cleidoic eggs exhibit

Column I contains names of the sphincter muscles of the alimentary canal and column II contains their locations. Match them properly and choose the correct answer 

Column IColumn II
ASphincter of ani internuspopening of hepatopancreatic duct into duodenum
BCardiac sphincterqbetween duodenum and posterior stomach
CSphincter of oddirguarding the terminal part of alimentary canal
DIlocaecal sphinctersbetween oesophagus and anterior stomach
Epyloric sphinctertbetween small intestine and bowel
Mitotic stages are not observed in
By the statement "Survival of the Fittest" Darwin meant that...............
The 2005 Nobel Prize for Physiology/Medicine was awarded to Barry Marshall and Robin Warren of Australia for their discovery of
Pinus belongs to the class................

Column I contains larval stages and column II contains the group to which it belongs. Match them correctly and choose the right answer. 

Column IColumn II
PlanulaAnnelida
TomariaMollusca
TrochophoreArthropoda
BipinnaariaChordata
GlochidiumHemichordata
 Coelenterata
CAM pathway is observed in.....................
Banana bunchytop virus is transmitted through.............
The pentose sugar in $DNA$ and $RNA$ has the
Protons or hydrogen ions produced by photolysis of water accumulate in the lumen of thylakoids. Photolysis of water takes place in inner membrane of thylakoid.
Which is a wrong statement?
Species is
Which part of Ephedra yields ephedrine?
In agar plate medium having bacteriophages and bacteria, there are clear transparent area called
Peptide synthesis inside a cell takes place in
The function of leghaemoglobin in the root nodules of legumes is
Which of the following is not a biofertilizer ?
Which one of the following is essential for photolysis of water?

What type of human population is represented by the following age pyramid?

Age Pyramid
A large proportion of oxygen is left unused in the human blood even after its uptakes by the body tissues. This $O _{2}$ :
If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from
Which one of the following have the highest number of species in nature ?