Water enters in to root hair from the soil in its normal condition because the osmotic pressure of the soil solution: 1) Remains lesser than that of root hair sap 2) Remains equal to that of root hair sap 3) Remains higher than that of root hair sap 4) Osmotic...
1stBrainly
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December 2022
One of the following does the same work as is done by proboscis gland in Balanoglossus : 1) Phallic gland in cockroach 2) Tube feet in Asteroidea 3) Antennal gland in prawn 4) Radula in pila
1stBrainly
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December 2022
From a circular disc of radius R and mass 9M, a small disc of radius R/3 is removed from the disc. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through O is
1stBrainly
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December 2022
LHS includes: 1) Antenna pigments only 2) Reaction centre only 3) Both antenna and reaction centre 4) Both core pigments and reaction centre
1stBrainly
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December 2022
The mass number of a nucleus is 1) Always less than its atomic number 2) Always more than its atomic number 3) Sometimes equal to its atomic number 4) Sometimes more than and sometimes equal to its atomic number
1stBrainly
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December 2022
Ethylene widely used in pineapple field as : 1) It helps to the internodal elongation of stem 2) It helps root and root hair formation 3) It helps to synchronize flower set and fruit set. 4) It produce more number of female flowers.
1stBrainly
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December 2022
One mole enantiomertically pure CH3CH2CH2 CH2 BrCH3 is reacted with one mole Br2 at 300 K. The number of possible chiral products formed is 1) 3 2) 6 3) 5 4) 7
1stBrainly
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December 2022
If the two ends p and n of a p-n diode junction are joined by a wire
In fusion, the percentage of mass converted into energy is about
1stBrainly
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December 2022
Intraplural pressure, ie, pressure in between parietal pleura and visceral pleura is approximately
1stBrainly
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December 2022
The plant part which consists of two generations one with in the other is :
1stBrainly
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December 2022
Cardiac output of an individual is about 5000 ml. Under normal physiological conditions how much O2 will be delivered to tissues : 1) 100 ml 2) 5 ml 3) 250 ml 4) 750 ml
1stBrainly
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December 2022
Read the two statements and choose the correct option given below. A) Photomodulation of flowering of flowering is a phytochrome regulated process. B) Active form of phytochrome (Pfr) directly induces floral induction in shoot buds.
1stBrainly
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December 2022
Which of the following statements are correct? A - Potassium function as activator and co-factor of many enzymes B - Potassium is a consistuent of many organic compounds
1stBrainly
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December 2022
In a p-n junction a potential barrier of 350 meV exists across the junction. A hole with a kinetic energy of 400 meV approaches. The K.E. of the hole when it crosses the junction (i) from p to n side (ii) from n to p side will be
1stBrainly
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December 2022
Coronary Artery Disease mainly affects blood vessels which supply blood to : 1) lungs 2) brain 3) kidney 4) heart
1stBrainly
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December 2022
Flowering can be inhibited if dark period is interrupted by a flash of light in : 1) Wheat 2) Tomato 3) Spinach 4) Rice
1stBrainly
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December 2022
Sodium surface is illuminated by ultraviolet and visible radiation successively and the stopping potential determined. This stopping potential is
The Rydberg constant R for hydrogen is