D. A is false but R is true.

B. They have at least one copy of the dominant allele. 

Structure of the operon: Each operon is a unit of gene expression and regulation and consists of one or more structural genes and an adjacent operator gene that controls transcriptional activity of the structural gene.

• The structural gene codes for proteins, rRNA and tRNA required by the cell.
• Promoters are the signal sequences in DNA that initiate RNA synthesis. RNA polymerase binds to the promoter prior to the initiation of transcription.
• The operators are present between the promoters and structural genes. The repressor protein binds to the operator region of the operon.

• The theory of use and disuse – Organs that are used often will increase in size and those that are not used will degenerate. Neck in giraffe is an example of use and absence of limbs in snakes is an example for disuse theory.
• The theory of inheritance of acquired characters – Characters that are developed during the life time of an organism are called acquired characters and these are then inherited.

Answer: (A)

4.5 to 4.7 billion years ago, the atmosphere of the earth consisted of methane and ammonia. In reducing atmosphere moderate energy sources were sufficient to produce amino acids and then protein. After that carbohydrate have formed.
So, the answer is 'NH₃ ,CH₄ , protein, carbohydrate'

Answer: Cro-Magnon man
Java ape-man & Peking man are belong to Homo erectus. Their brain capacity was about 800- 1200 cc. Homo sapiens sapiens evolved from Neanderthal man ( brain size 1400 cc). Homo sapiens sapiens brain capacity is about 1500cc. Cro - Magnon man is the early common name used for Homo sapiens sapiens. 

Tourists are buying experience not product. It promotes tourists to be presumes, i.e. to care about the future. Green tourism makes an optimal use of environment, tal resources. IT is important to maintain Environment & climate, 

Responsible and respectful etc through green destination.

d) tangents menu

The menu that describes only the entry and exit of curve segments from a key is called as tangents menu.

c) Video editor

Video editor is not MAYA editor.

 \(\vec T_1 = 2\hat i + 2\hat j - 3\hat k\)

\(\vec T_2 = -2\hat i + 2\hat j - 3\hat k\)

\(|\vec T_1|=\sqrt{2^2+2^2+(-3)^2}\) = \(\sqrt{4+4+9}=\sqrt{17}\)

\(|\vec T_2|=\sqrt{-2^2+2^2+(-3)^2}\) = \(\sqrt{4+4+9}=\sqrt{17}\)

Let angle between T₁ and T₂ is θ.

\(\therefore\) θ = \(\frac{\vec T_1.\vec T_2}{|\vec T_1||\vec T_2|}\) = \(\frac{(2\hat i+2\hat j-3\hat k).(-2\hat i+2\hat j-3\hat k)}{\sqrt{17}{\sqrt{17}}}\)

\(=\theta = cos^{-1}\frac1{17}\)

Hence, angle between both tangents is cos^-1\(\frac9{17}\).

if you mean f(x)=  ¹⁶√-x    then, as the root is an even integer, the unknown under the root must take a negative value to reverse the negative sign of (-x) into a positive value. SO the domain will take the non-positive portion of the x-axis -> (-∞,0]

the range will be [0,∞)    the non-negative portion of the y-axis

hope that helps 

f(x) = \(\sqrt{16-x}\) 

\(\because\) Domain of square root function \(\sqrt{g(x)}\) is g(x) \(\geq 0\).

\(\therefore\) For Domain of given function f(x)

96 - x \(\geq 0\)

⇒ x \(\leq\) 16

⇒ x \(\in\) (-\(\infty\), 16].

Because fever is the part of our body defence  against infection.

Cyclotron is a device used to accelerate heavy charged particle like proton a pure etc to high speed.

1 x 10^-10 to 3 x 10^-8 m.

Answer: Second class

Narendra Modi

Narendra Damodardas Modi is an Indian politician serving as the 14th and current prime minister of India since 2014. Modi was the chief minister of Gujarat from 2001 to 2014 and is the Member of Parliament from Varanasi.

The correct matching is:

Pitch → Frequency,

Quality → Waveform,

Loudness →Intensity.

Concept:

There are 7 class of insulating materials, each suitable for different application:

The permissible temperature limit at which the insulators may be worked safely without deterioration depends upon the type and class of the insulation as detailed below.

Advantages of LED 

1. Low operational voltage and less power consumption 

2. Fast action and no warm up time required 

3. Long life and ruggedness 

4. Fast on-off switching capability

V_C = \(\frac{qB}{2\pi m}\)

q = Charge 

B = magnetic field 

m = mass of the charged particle 

V_C = cyclotron frequency 

Self-inductance of a coil depends on 

1. number of turns of the coil 

2. area of cross section and length (geometry) 

3. permeability of the medium

Newton per coulomb (N/C)

F = qVBsinθ,

If θ = 90° (F_m – qυB)

The magnetic force is maximum only when moving charge is ⊥^r to field.

Correct option is (B) K decreases. P and E increase.

Correct option is (a) 1:2

V ∝ Z/n

V_H / V_He =  Z_H / Z_He n/n = 1/2

1. Loss due to heating 

2. Loss due to flux leakage 

3. Loss due to eddy currents 

4. Hysteresis loss.