The considerations that prompted the development of the Plant... | Agrigyan

In a standard laboratory seed germination test (conducted under strict ISTA rules with optimal moisture, substratum, temperature, and light), favorable environmental conditions are guaranteed; hence, option (D) ('conditions were not favorable') is ruled out.
The 30 ungerminated seeds fall into standard seed testing categories:

• Non-viable / dead seeds unable to respire or mobilize reserves (A).
• Hard seeds with an impermeable seed coat preventing imbibition of water (physical dormancy) (B).
• Fresh ungerminated or decayed seeds where the coat was permeable but the embryo was dead or infected (C).

Analyzing floral pollination mechanisms:

• Statement (A) is FALSE: Dicliny (unisexual flowers) and dichogamy (differential maturation of anthers and stigma) are classical adaptations that PREVENT self-pollination and PROMOTE cross-pollination (allogamy).
• Statement (B) is TRUE: Maize (Zea mays) is protandrous; tassels shed pollen 2-3 days before silks emerge from the ear.
• Statement (C) is TRUE: Both forms of dichogamy (protandry where pollen matures first, and protogyny where stigma matures first) temporally separate male and female function, favoring cross-pollination.
• Statement (D) is TRUE: Pearl millet (Pennisetum glaucum) is protogynous; the feathery stigmas emerge and mature several days before anthers emerge, facilitating cross-pollination.

Under the Indian Minimum Seed Certification Standards (IMSCS):

• Statement (A) is TRUE: For field inspection, a minimum of 5 random counts must be taken for a field up to 2 hectares, plus 1 additional count for every additional 2 hectares or part thereof.
• Statement (B) is TRUE: For a field of 6 to 8 ha:
  • Up to 2 ha = 5 counts

• to 4 ha = +1 count (6)
• to 6 ha = +1 count (7)
• 6 to 8 ha = +1 count (8 counts total).

• Statement (C) is FALSE: In sunflower, castor, and cotton, 1 count consists of 100 plants or heads, NOT 1100!
• Statement (D) is TRUE: In soybean, groundnut, wheat, rice, and pulses, 1 count comprises 1000 plants or heads.