Class X

Organic evolution mechanism was proposed by
  1. Nikola Tesla
  2. Marie Curie
  3. Gregor Mendel
  4. Charles Darwin
Book of Charles Darwin "On Origin of Species by means of Natural Selection" was published in
  1. 1868
  2. 1859
  3. 1862
  4. 1864
Kind of genotype in which two different alleles are carried by pair of gene is called
  1. homozygous genotype
  2. heterozygous genotype
  3. recessive genotype
  4. dominant genotype
Round structures of DNA (Deoxyribonucleic Acid) around histone proteins are called
  1. monohybrid genes
  2. hybrid genes
  3. chromosomes
  4. nucleosomes
Nitrogenous base thymine of one nucleotide made pair in other nucleotide with
  1. hydrogen
  2. cytosine
  3. guanine
  4. adenine
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