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Select the incorrect statement regarding imbibition.

Water is absorbed by germinating seeds through imbibition. The liquid which is imbibed is called imbibate. Imbibition is the phenomenon of... View Article

Underground rhizome is a common mode of reproduction in?

Mint Chrysanthemum Banana All of these Rhizomes are the main stems of the plant, running underground horizontally and growing continuously. A... View Article

Who coined the term virus?

Viruses are submicroscopic entities inhabiting host cells. In 1898, Martinus Beijerinck named the filtered infectious particle "virus", during... View Article

What is superficial placentation?

The gynoecium in superficial placentation is multicarpellary syncarpous having a great number of ovules that are borne on the walls of the loculi... View Article

The energy required to break one bond in DNA is 10-20J. Express it in eV.

The energy needed to break one bond in DNA is 10-20J We know 1 eV=> 1.6 x 10-19 J 1 J => eV/ 1.6 x 10-19 Substituting for J in 10-20J... View Article

When two plants L and M were exposed to different light intensities and temperatures, they showed changes in their rates of photosynthesis, which have been represented in the following graph. The graph indicates that,

a) Plant L is a C3 plant for which the light saturation point is 100% of full sunlight . b) Plant M is a C4 plant for which the optimum... View Article

Which structure{s) of proteins remains intact during the denaturation process?

a) Both secondary and tertiary structures b) Only primary structure c) Secondary structure only d) Tertiary structure only Answer: b) Only... View Article

Cataract blinds at least 120 million people globally every year. What is its main cause?

a) Gasoline fumes b) Heredity c) Ultraviolet radiations d) Unbalanced diet Answer: c) Ultraviolet radiations Explanation: UV rays from... View Article

If the temperature is increased above 35°C

a) Rate of decline of respiration will be earlier than that of photosynthesis b) Rate of decline of photosynthesis will be earlier than decline... View Article

The space between the cotyledonary node and the radicle is called as

a) Hypocotyl b) Epicotyl c) Raphe d) Hilum Answer: a) Hypocotyl Explanation: Hypocotyl is the portion found below the cotyledon and above... View Article

What is the difference between ejaculation and insemination?

Ejaculation is the release of semen, containing sperm from the male reproductive tract as a result of orgasm, whereas insemination is the entry... View Article

How to draw viruses easily?

Here is a simplified structure to draw viruses easily. Viruses are small structures consisting of DNA or RNA as their genetic material. The... View Article

log (log i) equals

(a) log π/2 (b) log iπ/2 (c) log π/2 + iπ/2 (d) log π/2 - iπ/2 Solution: i = eiθ = cos θ + i sin θ =... View Article

72% of 25 students are interested in mathematics. How many students are not interested in mathematics.

Solution: Given that 72% of 25 students are interested in mathematics. (72/100)×25 = 18 Number of students who are not interested in... View Article

Write the expanded form of the following numbers

(i) 2,79,404 (ii) 30,06,194 (iii) 28,06,196 (iv) 1,20,719 (v) 20,068 Solution: A number written as the sum of the place-values of its... View Article

Prime factorisation of 253.

Solution: We divide 253 by the smallest prime factor. We keep dividing until it gives a non-zero remainder. 253/11 = 23 23 is a prime number.... View Article

Express 14/9 as mixed fraction.

Solution: To convert 14/9 to a mixed fraction, we divide 14 by 9. The quotient is 1. The remainder is 5. Multiply the quotient by... View Article

If a = 2i – 2j + 3k, b = 3 i- 2j + 4k are two vectors then dot product of vectors a and b will be

Solution: a = 2i - 2j + 3k b = 3i - 2j + 4k Dot product, a.b = a1a2 + b1b2 + c1c2 = 6+4+12 = 22... View Article

Rachana makes a cuboid of plasticine of sides 5cm, 2cm, 5cm. How many such cuboids will she need to form a cube?

Solution: Volume of cuboid = lbh = 5×2×5 = 50 cm3 LCM of 5,2,5 = 10 The least length of cube = 10 cm Volume of cube = a3 = 103... View Article

Prime factorization of 232

Solution: We divide 232 by the smallest prime factor. We keep dividing until it gives a non-zero remainder. 232/2= 116 116/2 = 58 58/2 = 29... View Article