List of top Biology Questions

Fluoride pollutions mainly affects:
Which one of the following is wrong in relation to photorespiration ?
Given below are four matchings of an animal and its kind of respiratory organ:
  1. Silver fish – trachea
  2. Scorpion – book lung
  3. Sea squirt – pharyngeal gills
  4. Dolphin – skin

The correct matchings are:
 

Maximum application of animal cell culture technology today is in the production of
Which one of the following traits of garden pea studied by Mendel was a recessive feature:
Which group of vertebrates comprises the highest number of endangered species:
The genes controlling the seven pea characters studied by Mendel are now known to be located on how many different chromosomes:
Which one of the following conditions though harmful in itself, is also a potential saviour from a mosquito borne infectious disease:
When a cluster of genes show linkage behaviour they:
Which one of the following statements about viruses is correct:
In which kingdom would you classify the archaea and nitrogen-fixing organism, if the five-kingdom system of classification is used:
Mycorrhiza is an example of:
Tobacco mosaic virus is a tubular filament of size:
Stomata of a plant open due to
Which one of the following mineral elements plays an important role in biological nitrogen fixation
The aleurone layer in maize grain is specially rich in
The cells of the quiescent centre are characterised by
Sexual reproduction in Spirogyra is an advanced feature because it shows
Phenetic classification is based on:
Chromosomes in a bacterial cell can be 1–3 in number and:
Two crosses between the same pair of genotypes or phenotypes in which the sources of the gametes are reversed in one cross, is known as:
Random genetic drift in a population probably results from
Which one of the following is a matching pair of an animal and a certain phenomenon it exhibits:
During its life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stage respectively
Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone: