NEET Biology plant growth development pdfs,model,mock,grand exam

Plant Growth and Development Mock Exam-13

Question No:1

According to Hypothesis, which substances are responsible for photo periodism?

[A] Hormonal substance
[B] Abcissic acid
[C] Gibberellins
[D] All



Question No:2

When flowering is either quantitatively or qualitatively dependent or exposure to low temperature it is called ___ phenomenon

[A] Photo periodism
[B] Thermoperiodism
[C] Vernalisation
[D] Dormancy



Question No:3

Which of the plants don’t have winter and spring varieties?

[A] Wheat
[B] Rice
[C] Barley
[D] Rye



Question No:4

When are winter varieties planted?

[A] Spring
[B] Winter
[C] Autumn
[D] All



Question No:5

When is the harvesting of winter varieties done?

[A] Spring
[B] Winter
[C] Mid-summer
[D] Autumn



Question No:6

Biennials are what kind of plants

[A] Dicarpous
[B] Monocarpic
[C] Polycarpic
[D] None



Question No:7

Which of the following are common biennials?

[A] Carrots
[B] Cabbages
[C] Sugar beet
[D] All



Question No:8

Cold treatment to biennial plants will stimulate what kind of response?

[A] Photo hastens
[B] Photoropism
[C] Photo periodism
[D] All



Question No:9

Assertion: Plant retain the capacity for unlimited growth throughout their life.
Reason: This ability of the plants is due to the presence of meristem at certain location of body.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:10

Assertion: A sigmoid curve is a characterstic of living organism growing in a natural environment.
Reason: Sigmoid curve is S – shape curve.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:11

Assertion: Auxin induce parthenocarpy in tomatoes.
Reason: 2,4 —D used as herbicides.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:12

Assertion: GA increase yield in sugarcane.
Reason: GA causes increase in length of sugarcane stem.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:13

Assertion: Cytokinin delays leaf senescence.
Reason: Cytokinin promotes nutrient mobilization.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:14

Assertion: ABA increases the tolerance of plant to various kinds of stresses.
Reason: ABA stimulates the closure of stomata in the epidermis

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:15

Assertion: Ethylene increase yield in cucumber.
Reason: Ethylene promotes female flower in cucumber.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false