Sleeping movements commonly occur in plants of family :
The product of conjugation of Spirogyra is called
Which one of the following elements is not absorb through soil?
In moncotyledon roots, the histogen present at the apex of the root tip is –
Tetradynamous conditon is characteristics of
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Solution
There are six free stamens, inner four are large and outer two are small, e.g., Mustard, Iberis (Cruciferae family).
Cranium of man is made up of
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Solution
The cranium is formed by 8 bones. (1 frontal bone,2 parietal, 2 temporal, 1 occipital, 1 sphenoid, 1 ethmoid).
Which one of the following organs in the human body is most affected due to shortage of oxygen?
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Solution
Brain is the most vital organ. It stops functioning in the absence of O2.
Parathormone induces
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Solution
Parathormone is secretion by parathyroid gland. It is also called as parathymin, it controls calcium levels in blood plasma and metabolism.
Terrestrial plants obtain all of the following nutrients from the soil except . . .
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Solution
The bulk of the organic material of a plant is derived from carbon dioxide assimilated from the atmosphere.
Industrial melanism as observed in peppered moth proves that
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Solution
During the period when the number of coal-burning factories in England was increasing (during the Industrial Revolution) it was noticed that the number of melanic individuals of the species of Peppered Moth (Biston betularia) was becoming more common. Originally rare in the population of normally light-colored moths, the frequency of the melanic form increased in polluted are as until it was over 90%. This change in color has come to be known as “industrial melanism.”
One of the important consequences of geographical isolation is:
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Solution
Speciation takes place via reproductive isolation which is the most important consequence of geographical isolation.
Cardiac cycle in man takes about
RNA primersare necessary in DNA synthesis because
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Solution
DNA polymerase cannot initiate the building of a nucleotide strand; it can only add to an existing strand.Thus, RNA primers are necessary to begin DNA synthesis.
Which of the following is not a pteridophyte?
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Solution
Ginkgo is a gymnosperm.
ou are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of them will you not use for the purpose?
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Solution
Presence of calcium will remove heparin - blood anti-coagulant and will promote blood clotting. Sodium oxalate and heparin containing test tubes will not allow the blood to clot.
No image formation occurs on blind-spot of retina because
The following ratio is generally constant for a given species:
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Solution
According to Chargaff purines and pyrimidines are in equal amounts. Purine (adenine) is equimolar with pyrimidine (thymine) and purine (guanine) is equimolar with pyrimidine (cytosine). Base ratio is specific for species.
The age of pyramid with broad base indicates
Native auxin (Endogenous) is transported in the plant
A division is formed by combining several –