Class X

Endosperm nucleus of flower is developed into the
  1. seed cell
  2. endosperm embryo
  3. endosperm nucleus
  4. endosperm tissue
Spores of bacteria that are formed in bacterial cells are called
  1. endospores
  2. exospores
  3. rib spores
  4. protospoers
After mitosis, diploid zygote turns into
  1. haploid sporophyte
  2. diploid gametophyte
  3. haploid gametophyte
  4. diploid sporophyte
Primary spermatocytes are responsible for production of
  1. two diploid spermatids
  2. two haploid spermatids
  3. four haploid spermatids
  4. four diploid spermatids
Species of bacteria that reproduces under unfavorable conditions by formation of spores are
  1. paramecium and corals
  2. euglena and hydra
  3. clostridium and bacillus
  4. Rhizopus and amoeba
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