The synthetic hormone used as a weedicide is
Indole 3-acetic acid
gibberellic acid
2, 4- D
Indole butyric acid
C.
2, 4- D
High concentration of synthetic auxins such as 2, 4- D or 2, 4- Dichlorophenoxyacetic acid and 2, 4- T or 2, 4- Trichlorophenoxy acetic acid helps in destroying the dicot seeds.
Natural auxins are IAA or Indole 3-acetic acid and IBA or Indole butyric acid.
Grafting is not possible in monocots because they
lack cambium
have scattered vascular bundles
have parallel venation
are herbaceous
In synapsis two homologous chromosomes are connected at
centromeres
chromomeres
telomeres
none of these
What is true about vein ?
All veins carry deoxygenated blood
All veins carry oxygenated blood
They carry blood from organs towards heart
They carry blood from heart towards organs
Fermentation products of yeast are
H2O + CO2
Methyl alcohol + CO2
Methyl alcohol + water
Ethyl alcohol + CO2
Stages in proper sequence of prophase- I are
zygotene, leptotene, pachytene, diakinesis
leptotene, zygotene, pachytene, diplotene and diakinesis
eptotene, pachytene, zygotene, diakinesis and diplotene
diplotene, diakinesis, pachytene, zygotene and leptotene