Which of the following physical phenomena can not be described only by the wave theory of electromagnetic radiation...? Mcqs

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Which of the following physical phenomena can not be described only by the wave theory of electromagnetic radiation...?

(A) Diffraction
(B) interference

(C) Photoelectric emission
(D) Polarization

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Choose the incorrect statement regarding meiosis...?

(A) Maintain chromosome number from generation to generation
(B) Reduces the diploid number of chromosomes to half

(C) Takes place in germ cell to produce gametes
(D) Production of new somatic cells from germ cells

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Sleeping sickness in the natives of Africa is caused by________...?

(A) Trichomonas
(B) Giardia

(C) Leishmania
(D) Trypanosoma

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Among the following, which group of food help our body grow and repair tissues and muscles...?

(A) Carbohydrates
(B) Vitamins

(C) Proteins
(D) Minerals

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How many types of nutrients are there...?

(A) 1
(B) 2

(C) 3
(D) None of These

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Sound waves first enter the ______...?

(A) Eardrum
(B) Cochlea

(C) Ear Canal
(D) Stirrup

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Lever, pulley, wedge, wheel, inclined plane and screw is/are an examples of...?

(A) Simple Machine
(B) Compound Machine

(C) Both A and B
(D) None

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Chromosomes consist of two genetically identical copies of thread called...?

(A) Chromonema
(B) Chromosomes

(C) Chromatids
(D) Chromatin

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When light strikes an opaque object, the light is blocked, thus a ________ is formed on the opposite side of the object....?

(A) Reflection
(B) Refraction

(C) Image
(D) Shadow

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Organisms that eat all the dead and waste products and returning useful elements to soil and environment are known as...?

(A) Decomposers
(B) Producers

(C) Consumers
(D) None

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