Vidaara.orgClass 11 · Mathematics
CodeVID-M11-WS
Anatomy of Flowering Plants — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
15 × 1 = 15 marks
1.
The study of the internal structure of plants is:
- A.Morphology
- B.Anatomy
- C.Ecology
- D.Taxonomy
2.
Tissues with actively dividing cells are:
- A.Permanent tissues
- B.Meristematic tissues
- C.Complex tissues
- D.Cork
3.
The apical meristem is responsible for increase in:
- A.Girth
- B.Length (primary growth)
- C.Cork
- D.Pith only
4.
Thin-walled living tissue mainly meant for storage is:
- A.Sclerenchyma
- B.Collenchyma
- C.Parenchyma
- D.Xylem
5.
Dead, lignified cells giving mechanical strength form:
- A.Parenchyma
- B.Collenchyma
- C.Sclerenchyma
- D.Phloem
6.
Xylem and phloem are examples of ___ tissues.
- A.Simple
- B.Complex (conducting)
- C.Meristematic
- D.Cork
7.
Xylem mainly conducts:
- A.Food downward
- B.Water and minerals upward
- C.Hormones
- D.Oxygen
8.
In a dicot stem, the vascular bundles are:
- A.Scattered, closed
- B.Arranged in a ring, open (with cambium)
- C.Absent
- D.Only in the pith
9.
Monocot stems usually show no secondary growth because their bundles are:
- A.Open
- B.Closed (no cambium)
- C.In a ring
- D.Very large
10.
A dorsiventral leaf has mesophyll differentiated into palisade and:
- A.Cork
- B.Spongy parenchyma
- C.Sclerenchyma
- D.Cambium
11.
Secondary growth increases the ___ of a plant.
- A.Length
- B.Girth (thickness)
- C.Leaf number
- D.Flower size
12.
The vascular cambium forms secondary xylem on the ___ side.
- A.Outer
- B.Inner
- C.Upper only
- D.It forms none
13.
Small openings in the bark that permit gas exchange are:
- A.Stomata
- B.Lenticels
- C.Hydathodes
- D.Sieve pores
14.
One annual ring is formed by:
- A.One ring each of spring wood and autumn wood
- B.Cork only
- C.Two springs
- D.Phloem only
15.
The darker, harder, non-conducting central wood that gives support is:
- A.Sapwood
- B.Heartwood
- C.Cork
- D.Phloem
Section B — Challenge / Olympiad (2 marks each)
6 × 2 = 12 marks
16.
Why can a dicot stem grow thicker over years while a typical monocot palm cannot?
- A.Dicot stems have a vascular cambium (open bundles); monocots lack it (closed bundles)
- B.Monocots have more water
- C.Dicots have no xylem
- D.Palms are not plants
17.
The trunk of an old tree is mostly secondary xylem because the cambium:
- A.Adds far more xylem (inward) than phloem (outward)
- B.Adds only phloem
- C.Stops dividing early
- D.Makes only cork
18.
Counting 30 annual rings in a tree trunk suggests the tree is about:
- A.30 years old
- B.60 years old
- C.15 years old
- D.300 years old
19.
Collenchyma is well suited to support young, growing stems because it is:
- A.Thickened yet living and flexible, so it bends without breaking
- B.Dead and rigid
- C.Unable to support anything
- D.Made of cork
20.
A cross-section shows vascular bundles scattered throughout the ground tissue with no cambium. The organ is a:
- A.Monocot stem
- B.Dicot stem
- C.Dicot root
- D.Dorsiventral leaf
21.
Bulliform cells in a monocot (e.g. grass) leaf help the plant by:
- A.Rolling/folding the leaf to reduce water loss in dry conditions
- B.Conducting water
- C.Producing flowers
- D.Storing chlorophyll
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Anatomy
- (B) Meristematic tissues
- (B) Length (primary growth)
- (C) Parenchyma
- (C) Sclerenchyma
- (B) Complex (conducting)
- (B) Water and minerals upward
- (B) Arranged in a ring, open (with cambium)
- (B) Closed (no cambium)
- (B) Spongy parenchyma
- (B) Girth (thickness)
- (B) Inner
- (B) Lenticels
- (A) One ring each of spring wood and autumn wood
- (B) Heartwood
Section B — Challenge / Olympiad (2 marks each)
- (A) Dicot stems have a vascular cambium (open bundles); monocots lack it (closed bundles)
- (A) Adds far more xylem (inward) than phloem (outward)
- (A) 30 years old
- (A) Thickened yet living and flexible, so it bends without breaking
- (A) Monocot stem
- (A) Rolling/folding the leaf to reduce water loss in dry conditions
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