List of top Biology Questions

After a mutation at a genetic locus the character of an organism changes due to the change in
One of the following is a very unique feature of the mammalian body
When a diploid female plant is crossed with a tetraploid male, the ploidy of endosperm cells in the resulting seed is
In Arthopoda, head and thorax are often fused to form cephalothorax, but in which one of the following classes, is the body divided into head, thorax and abdomen ?
The inflorescence in Ocimum is
Which of the following is a dual purpose breed?
One set of a plant was grown at $12$ hours day and $12$ hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower. Under which one of the following categories will you place this plant?
In your opinion which is most effective way to conserve the plant diversity of an area
The most likely reason for the development of resistance against pesticides in insects damaging a crop is
Presence of gills in the tadpole of frog indicates that
Chemically hormones are
Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency
Flagella of prokaryotic and eukaryotic cells differ in
Lichens are well known combination of an alga and a fungus where fungus has
Which one of the following pairs is not correctly matched ?
In 1984, the Bhopal gas tragedy took place because methyl isocyanate
An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having
Plants adapted to low light intensity have
Ovulation in the human female normally takes place during the menstrual cycle
A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is
Crossing over that results in genetic recombination in higher organisms occurs between :-
A nutritionally wild type organism, which does not require any additional growth supplement is known as
In a mutational event, when adenine is replaced by guanine, it is a case of
Injury to vagus nerve in human is not likely to affect
In which one of the following habitats does the diurnal temperature of soil surface vary most ?