The first process by which water enters into the seed coat when a seed is placed in suitable environment for germination is
Osmosis
Active transport
Absorpour
Imbibition
If flowers are cut and dipped in dilute NaCl solution,then
Transpiration is low
Endosmosis occurs
No bacterial growth takes place
Absorption of solute inside flower cell takes place
Hydathodes are also called
Water stomata
Sunken stomata
Guard cells
Subsidiary cells
Etiolation in plants is caused when they
Are grown in dark
Have mineral deficiency
Are grown in intense light
.
Are grown in blue light
A nutritionally wild type organism, which does not require any additional growth supplement is known as
Phenotype
Holotype
Auxotroph
Prototroph
Nitrite is converted to nitrate by:
Nitrosomonas
Nitrobacter
Pseudomonas
Clostridium
In plants, continuous water supply is due to
Guttation
Adhesion-cohesion forces
Assertion: Nitrogen fixing enzyme in legume root nodules functions at low oxygen concentration.
Reason: Low oxygen concentration is provided by leghaemoglobin.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Both Assertion and Reason are true but Reason is not correct explanation of Assertion.
Assertion is true but Reason is false
Both Assertion and Reason are false.
Maximum percentage of which element occurs in plant ash
Magnesium
Zinc
Potassium
Calcium
The water available of plants for absorption is
Gravitational water
Hygroscopic water
Capillary water
Chemically bound water
