Stem-NEET Biology practice test 2 Solved questions with detailed explanations

21)

Assertion(A) :Allium cepa contains dimorphic leaves.
Reason(R) : Scape bears both leaves and flower in onion.

A)
Both A & R are true and R is correct explanation of A
B)
Both A & R are true, but R is not the correct explanation of A
C)
A is true but R is false.
D)
A is false but R is rrue.

Discussion

22)

Arrange the following photosynthetic stems in descending order with reference to their relative part of stem modified

I. Casuarina
II. Asparagus
III. Ruscus
IV. Opuntia

A)
II, III, I, IV
B)
IV, III, I, II
C)
IV, I, III, II
D)
II, III, IV, I

Discussion

23)

Buds (or) flowers cannot be produced from

A) Thorn
B) Phylloclade
C) Phyllode
D) Spine

A)
All except A and B
B)
All except B and C
C)
All except D
D)
All except B and D

Discussion

24)

Study the following statements and identify the correct pair.

I. Bulb of Allium cepa is a modified stem.
II. "Cloves" of Allium sativum are fleshy scale leaves.
III. Corm of Colacasia is a modified root.
lV. Tendril in Vitis vinifera is a modified axillary bud.

[EAMCET, 2002]

A)
I and II
B)
II and IV
C)
ll and lll
D)
l and lV

Discussion

25)

The underground stem that has contractile roots is

[EAMCET, 2005]

A)
Rhizome
B)
Corm
C)
Stem tuber
D)
Bulb

Discussion

Stem and Stem modifications- Practice Test 2

Answer: Option C

Answer: Option C

Answer: Option A

Answer: Option A

Answer: Option B