- AStructural pattern of an organism.
- BSequence of amino acid in protein chain.
- CVariation in offsprings.
- DConsistency of morphological trait.
Explanation:
Genetic code determines sequence of amino acid in protein chain. The genetic code expresses in a way that 64 Codons constitute it, as it occurs in triplets. According to the genetic code, three bases must be employed to encode the 20 standard amino acids used by living cells to build proteins.
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$I$. Each cell of sporogenous tissue in anther is capable of giving rise to microspore tetrad.
$II$. The pollen grain represent male gametophyte.
$III$. Pollen grains are usually triangular and $10-15 \mu m$ in diameter.
$IV$. Sporopollenin is one of the most resistance organic material which can be destroyed only by strong acids
and alkali.