Which cell organelle is covered by only one unit membrane ?
Nucleus
Plastids
Mitochondria
Lysosome
The S-phase of cell cycle is characterized by:
duplication of chromosome
shotening of chromosome
duplication of DNA
duplicatin of centriole
Phytotron is :
a controlled condition chamber for tissue
leaf culture process
special culture of plants
root culture process
Fruits are formed in :
Brassica
Fern
Cycas
Funaria
A.
Brassica
Fruit formation is the characteristic feature of Angiosperms. It is found in Brassica, Bryophytes, Pteridophytes, whereas Gymnosperms lack fruit like structure.
If centromere is the middle, the chromosome is called :
sub-metacentric
metacentric
acentric
telocentric
Which hormone is responsible for mobilization of storage food during seed germination ?
Auxin
Gibberellin
Cytokinin
Ethylene