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Placenta of Lily family is with
Page number-81
5.9 Description of Some Important Family
5.9.3 Liliaceae
Morphology of Flowering Plants
Which of the following flower has not good ornamental value ?
Page number-81
5.9 Description of Some Important Family
5.9.3 Liliaceae
Morphology of Flowering Plants
Which of the following is not a source of medicine?
Page number-81
5.9 Description of Some Important Family
5.9.3 Liliaceae
Morphology of Flowering Plants
Asparagus comes under
Page number-81
5.9 Description of Some Important Family
5.9.3 Liliaceae
Morphology of Flowering Plants
Leaf is
Page number-82
Summary
Morphology of Flowering Plants
The most impotant function of the trichomes is:
Trichomes are epidermal hairs on the sterm and help in prevention of water loss due to transpiration.
Which of the following has unevenly thick cell wall, has a primary wall (cellulose) and a secondary wall (hemicellulose or pectin), and is a simple, living, primarily mechanical tissue of the plant body?
Answer 2. Collenchyma cells are much thickened at the corners due to a deposition of cellulose, hemicelluloses and pectin.
Intercalary meristems are primary meristems because:
I. They appear early in life of a plant.
II. They contribute to the formation of the primary plant body.
Read page 85 XI NCERT
What is the number of correct statements amongst the following regarding phloem tissue of plants?
I. Gymnosperms lack albimunous cells and
sieve cells.
II. The companion cells are specialized
parenchymatous cells.
III. Phloem parenchyma is absent in most of the
monocotyledons.
IV. Phloem fibers are generally absent in the
primary phloem.
Statement I is incorrect. Read page 88 of class XI NCERT
Identify the wrong statement in context of heartwood.
(c) Heartwood also called duramen is the central dead wood of trees. It comprises of dead, lignified cells containing organic compounds, eg. tannins or other substances. These substances make it darker in colour and aromatic. Heartwood is strong durable and resistant to decay. It does not conduct water and minerals because of the presence of dead elements. Thinking Process The conduction of water and
minerals is carried out by sapwood, because it contains living cells.
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