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Carefully crack open the shell of specimen G (Ground nut) and extract the seed. Describe three observable physical features of the seed. Gently remove the thin, reddish seed coat (testa) and separate the seed into its natural halves.

Biology

ScanSolve AI Answer

Hapa kuna majibu ya maswali kutoka kwenye picha hii:

1. a) Sifa tatu zinazoonekana za kimwili za mbegu ya karanga ni:

  • Kwa kawaida ina umbo la figo au mviringo.
  • Ina rangi ya hudhurungi-nyekundu au njano iliyokolea.
  • Ina umbile laini.

1. b) (i) Jina la kibotania linalopewa nusu hizi mbili ni kotiledoni (cotyledons).

1. b) (ii) Kulingana na jibu lako katika 1b(i), sampuli G ni ya kundi la Dicotyledoneae (au dicots).

1. c) Siwezi kuchora michoro. Hata hivyo, mchoro ulioandikwa vizuri wa mbegu ya karanga iliyogawanywa (kwa ukuzaji wa x3) unapaswa kuonyesha wazi:

  • Kotiledoni mbili kubwa (nusu mbili za mbegu).
  • Kiinitete kidogo kilichounganishwa na mojawapo ya kotiledoni.
  • Ndani ya kiinitete, radicle (mzizi wa kiinitete) ukiangalia chini.
  • Ndani ya kiinitete, plumule (chipukizi cha kiinitete) ukiangalia juu.

1. d) (i) Uchunguzi ni doa la kudumu la uwazi (permanent translucent spot) kwenye karatasi ya chujio.

1. d) (ii) Uchunguzi huu unaonyesha uwepo wa lipidi (mafuta).

1. d) (iii) Thamani ya lishe ya mbegu ya karanga ni kwamba ni chanzo cha nishati (kutokana na mafuta na protini nyingi).

2. a) Sehemu hii inaelezea utaratibu wa kuandaa sehemu ya msalaba ya mzizi wa mche wa mahindi kwa uchunguzi wa hadubini.

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