List of top Biology Questions

Appetency is the formation of new structure or habit of the organism according to its need. Appetency is also called doctrine of desire.
AIDS and hepatitis B are sexually transmitted diseases. There is no permanent cure for both of them.
Agrobacterium tumefaciens is popular in genetic engineering because this bacterium is associated with the roots of all cereal and pulse crops. A gene incorporated in the bacterial mesosome gets automatically transferred to the crop with which the bacterium is associated.
A geneticist crossed two plants and got 50% tall and 50% dwarf progenies. This cross follows Mendelian law as one of the parent plant might be heterozygous.
Contraction of the cremaster muscle occurs because of
A patient of diabetes mellitus excretes glucose in urine even when he is kept on a carbohydrate free diet. It is because
Photorespiration is found in all plants. In C plants, first CO fixation product is formed in bundle sheath cells.
According to the accepted concept of hormone action, if receptor molecules are removed from target organs, then the target organ will
Albuminous seeds are found in
Phenylpyruvic acid is excreted through urine in case of phenylketonuria. The affected individual lacks enzyme phenylalanine hydroxylase.
Petroplants produce large amount of latex. The latex contains long chain hydrocarbons.
In malignant tumors, the cells divide rapidly and move to distant parts of the body and cause new tumors. This property is called
What is common between a Eukaryotic & Prokaryotic flagella?
Where is sacculus rotundus located?
Histamine is secreted by
Which of the following belongs to Class Osteichthyes?
Which one of the following has the largest population in a Food Chain?
Which one is Total Stem Parasite?
Which of the following animal groups belong to same class ?
The nuclear material in a bacterium is made up of:
In Ulothrix sexual reproduction is by:
CDRI (Central Drug Research Institute ) is situated at:
Canada Balsam is obtained from the plant :
Which of the following group of animals is guanotelic ?
The immunity developed by a child after attack of measles is ______ immunity