In modern periodic table, how many groups are there...? Mcqs

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In modern periodic table, how many groups are there...?

(A) 12
(B) 18

(C) 7
(D) 8

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Pollen grains are microscopic structure located in _____ of flower....?

(A) Stamen
(B) Anther

(C) Pistil
(D) Petal

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Hydrogen bomb is based on the principle of ________ ...?

(A) Nuclear fusion
(B) Artificial radioactivity

(C) Natural radioactivity
(D) Nuclear fission

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Function of restriction enzymes...?

(A) Join DNA fragments
(B) Cut the DNA

(C) Replicate the DNA
(D) Unwind the DNA

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DNA is a very large molecules and consists of units called...?

(A) Amino acids
(B) Nucleotide

(C) Cells
(D) Molecules

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The process of comparing an unknown physical quantity with a known standard quantity of the same kind is called...?

(A) Observation
(B) Measurement

(C) Experimentation
(D) Calculation

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The first organism on earth were _______________...?

(A) autotrophs
(B) heterotrophs

(C) saprotrophs
(D) none of these

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The floral part that produces pollen grains is:...?

(A) Sepal
(B) Petal

(C) Anther
(D) Ovary

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Which of the following glands secrete tears...?

(A) Lachrymal
(B) Pituitary

(C) Thyroid
(D) Pancreas

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Ultrasound has several uses in medicine and industry. Which one has use of ultrasound...?

(A) Absorption
(B) Pre-natal scanning

(C) Dispersion
(D) Measuring humidity of air

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