STD 11 - 13. Plant growth and development — NEET STD 11 Science — Question

Moss and liverworts are.

How many hotspots of biodiversity in the world have been identified till date by Norman Myers ?

Felidae and Canidae included in which order?

Which of the following statements are correct for genetic code ?
(i) George Gamow, first reported that the code should be made up of three nucleotides.
(ii) Har Gobind Khorana developed chemical method for synthesising RNA molecules with defined combinations of bases (homopolymers and co-polymers).
(iii) Nirenberg developed cell-free system for protein synthesis which finally helped in decoding of codons.
(iv) Ochoa discovered enzyme polynucleotide phosphorylase which helpful in polymerising RNA with defined sequences (enzymatic synthesis of RNA).
(v) One codon codes for many amino acids, hence, it is unambiguous and specific.
(vi) Some amino acids are coded by only one codon, hence the code is degenerate.
(vii) AUG has dual functions, it codes for Methionine and it also act as initiator codon.

When the inner half of the oospore after the first division develops into an embryo and outer half develops into suspensor. This type of development is called

The endosperm of gymnosperm is

Mutations which alter nucleotide sequence within a gene are called

Select the correct sequence of events.