Which one of the following pairs is correctly matched?
Rhizobium - Parasite in the roots of leguminous plants
Mycorrhizae - Mineral uptake from soil
Yeast - Production of biogas
Myxomycetes - The disease ring worm
B.
Mycorrhizae - Mineral uptake from soil
Mycorrhiza is an example of mutualism. Mutualism is an interaction between two or more species where fitness is increased through direct interaction. It is an association between a fungus and the root of a higher plant. eg. Pine, Birch.
The fungus obtains shelter and food from root and helps the root in absorption of water, dissolution and absorption of inorganic nutrients locked in organic matter (especially nitrogen and phosphorus) and protection from other fungi.
Viroids have
single stranded RNA not enclosed by protein coat
single stranded DNA not enclosed by protein coat
double stranded DNA enclosed by protein coat
double stranded RNA enclosed by protein coat
Hill reaction occurs in:
high altitude plants
total darkness
absence of water
presence of ferricyanide
Plasmodesmata connections help in
cytoplasmic streaming
synchronous mitotic divisions
locomotion of unicellular organism
movement of substances between cells
The quiescent centre in root meristem serves as a
site for storage of food which is utilized during maturation
reservoir of growth hormones
reserve for replenishment of damaged cells of the meristem
region for absorption of water
Azolla is used as a biofertilizer because it
multiplies very fast to produce massive biomass
has association of nitrogen - fixing Rhizobium
has association of nitrogen - fixing cyanobacteria
has association of mycorrhiza
Assertion : Smaller the organism higher is the rate of metabolism per gram weight.
Reason : The heart rate of a six month old baby is much higher than that of an old person.
If both Assertion and Reason are true and the reason is the correct explanation of the assertion
If both Assertion and Reason are true but the reason is not the correct explanation of the assertion
If Assertion is true statement but Reason is false
If both Assertion and Reason are false statements
Assertion : Severe Acute Respiratory Syndrome (SARS) originated in China.
Reason : China is the most populated country of the world.
If both Assertion and Reason are true and the reason is the correct explanation of the assertion
If both Assertion and Reason are true but the reason is not the correct explanation of the assertion
If Assertion is true statement but Reason is false
If both Assertion and Reason are false statements
Assertion : A cell membrane shows fluid behaviour.
Reason : A membrane is a mosaic or compositeof diverse lipids and proteins.
If both Assertion and Reason are true and the reason is the correct explanation of the assertion
If both Assertion and Reason are true but the reason is not the correct explanation of the assertion
If Assertion is true statement but Reason is false
If both Assertion and Reason are false statements
Assertion : Rhoeo leaves contain anthocyanin pigments in epidermal cells.
Reason : Anthocyanins photosynthetic pigments.
If both Assertion and Reason are true and the reason is the correct explanation of the assertion
If both Assertion and Reason are true but the reason is not the correct explanation of the assertion
If Assertion is true statement but Reason is false
If both Assertion and Reason are false statements
