Select the correct statement:
Legumes are incapable of fixing nitrogen
Legumes fix nitrogen through bacteria living in fruits.
Legumes fix through only by bacteria present in root nodules.
None of the above
This hormone affects opening and closing of stomata.
Zeatin
Abscisic acid
Ethylene
GA
Which of the following is a macronutrient ?
Molybdenum
Calcium
Zinc
Manganese
Etiolation in plants is caused when they
Are grown in dark
Have mineral deficiency
Are grown in intense light
.
Are grown in blue light
In a fully turgid cell ___ is zero.
OP
TP
WP
DPD
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
In higher plants, the shape of the chloroplast is
Discoid
Cup-shaped
Girdle-shaped
Reticulate
In thistle funnel experiment, what will occur if sugar solution is added to beaker, after the process of osmosis stops?
The level of solution in thistle funnel rises up
The level of solution in thistle funnel lowers
The level of solution in beaker lowers
The level of solution remains unaffected in beaker
Assertion: Salt resistant plants survive in saline habitats by maintaining low internal Na+ levels
Reason: Salt resistant plants get rid of excess Na+ by ATP energized antiporter.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
Both Assertion a d Reason are true but Reason is not correct explanation of Assertion.
Assertion is true but Reason is false
Assertion is false but Reason is true.
Potometer works on the principle of
Amount of water absorbed equals the amount transpired
Osmotic pressure
Root pressure
Potential difference between the tip of the tube and that of the plant.
