Passage cells help in
transport of water towards pericycle
transport of water towards epiblema
absorption of water from soil
passage of CO2 towards stomata
A.
transport of water towards pericycle
Passage cells are endodermal cells of older roots which have ratained thin walls and casparian strips rather than becoming suberised and waterproof- like the other cells around them, to continue to allow some symplastic flow to the inside. The radial arrangement of vascular bundles and the presence of these passage cells opposite the protoxylem facilitates the inflow of water from the pericycle in the root hair zone.
Which one of the followings is an in situ method of biodiversity conservation?
National park
Botanical garden
Zoological garden
Scientific laboratory
All of the following symptoms are found in jaundice except
disorders of hepato-biliary system
abnormal secretion of pancreatic and gastric juices
bile duct obstruction
anaemia
Which one of the following combinations acts as a usual antigen binding site of an antibody?
Variable regions of a light and another heavy chain
Variable regions of two light chains
Variable regions of two heavy chains
Variable region of a heavy chain and constant region of a light chain
Neoteny refers to
development of gonads
moulting
metamorphosis
retention of larval traits in the adult body
The animal species controlling the ecosystem functioning is known as
edge species
pioneer species
keystone species
umbrella species
Central dogma in molecular biology is
RNA DNA Protein
DNA RNA Protein
RNA Protein DNA
DNA Protein RNA