Lenticels are found on
From which stage of silkmoth ,the silk is obtained ?
Joining of repeating units to form a macromolecules is called
A condition called tachycardia exists when a person’s heart rate is abnormally high. Which of the following explains how tachycardia may arise?
Compartmentalisation of cells is useful in
Bacteria have cell membrane made of
The continuity of cytoplasm from one cell to other cell is maintained by
Each successive trophic level has
Pioneers in the field of organic evolution were
The principal cereal crop of India is
Wings of mosquito, bat and bird show evolution called
Which is not vestigial in humans
Nucleotide pairs present in one turn of DNA helix
Which one is correct matching
DNA replication in eukaryotes commences
Phenotypic dihybrid ratio is
If a trait is passed from man to all of his sons only
A human male has one one barr body in his somatic cell nuclei. The chromosome constitution must be
Which of the following is releated to haemophilia ?
Interferon suppresses the pathogenicity of
Cornea transplantation has become common due to
A fibrous root system is adapted better than tap root system to perform the function of
Aril represents the edible part of
The plants with biggest flower (Rafflesia) is a
Nitrogen fixation occurs in
Mass flow hypothesis explains
Plants with similar genotypes are
Which among the following is an air pollution indicator?
When protoxylem develops towards periphery, it is called
The true statement about 'green-house effect' is that it is caused by
Which of the following pair is mismatched?
Which one carries malarial parasite to the host?
The corpus luteum is formed at the site of
Ichthyology is the study of
Principle of Natural Selection was proposed by
Some organism escape detection from enemies by resembling other organisms. The phenomenon is
In random mating population in equilibrium, which of the following brings about a change in gene frequency in a nondirectional manner
The composition of the filtrate in the Bowman’s capsule is determined by
Which of the following causes the release of aldosterone?