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Commercial shellac is obtained from the secretion of:
Which of the following enzymes is correctly matched with its source?
Choosing from the following list, the most effective means of preventing conception is _____________.
The stem cells that give rise to all red blood cells, white blood cells, and platelets are known as:
The process of mating among closely-related individuals is known as
Cromagnon Man differs from Neanderthal Man in having
Within minutes of fertilization, a clear cytoplasmic region forms at the animal pole, and there are extensive streaming movements within the bulk of the egg cytoplasm. The sperm enters the egg through a micropile through animal pole.
During spermatogenesis, which stage is the first to be haploid in number of chromosomes?
Replacement of a purine base with another purine base is
Sequence of genes in lac operon of Echerichia coli is
Of incomplete dominance phenotypic ratio in F₂ progeny is
In certain animals 25% of shorter siblings fail to cross the normal age. It is due to
Deficiency of vatimn A in the body results in insufficent rhodopsin in the rods which leads to
A peripheral location of nucleus is the characteristic of
Neurotransmitters may create an action potential when they
Organic compounds first evolved on earth and required for origin of life were
Nastic movements differ from tropic movements in being
Escherichia coli is used as an indicator organism to determine pollution of water with
Which of the following would be affected by removal of the prostate gland?
Which of the following is an example of internal respiration?
Binomial nomenclature means writing the names of plants in two words denoting their -
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