a.
b.
sporophylls of the same plant.
3. Answer the following questions in
your own words.
a. Write
the charateristics of
subkingdom Phanerogams.
b. Distinguish between monocots and
dicots.
c. Write a paragraph in your own
words about the ornamental plants
called ferns.
d. Sketch, label and describe the
Spirogyra.
e
D
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Answers
Answer: (A) 1)They have a saprophytic body, and is well differentiated into true roots, stems, and leaves.
2)Well developed vascular tissues are present, which forms the vascular system.
3)Well-developed, multi-cellular sex organs are present.
4)After fertilization, the embryo develops from the fertilized egg.
(B) Monocots Dicots
Plants that have only one
cotyledon in seeds are monocots Plants that have two cotyledons in
seeds are dicots
The floral parts are in multiples of The floral parts are in multiples of three four or five
The pollen tube is monocolpate The Pollen tube is tricolpate
The leaves have parallel venation The leaves have reticulate venation
Dorsiventral leaves are present Isobilateral leaves are present
Stomata are present on both the Stomata are more on the lower
upper and lower epidermis of surface of leaves
leaves
The adventitious root system is The taproot system is present
present
Vascular bundles in the stem are Vascular bundles in the stem are
scattered. present in a ring.
(C) Ferns are the nonflowering vascular plants having true leaves, stems, and roots.
Ferns are believed to be one of the oldest plants on earth and are the second most diverse group of vascular plants.
These plants reproduce by means of spores.
They inhabit warm and damp areas of the earth.
Some ferns are also used as a source of food and medicines also.
Azolla is used in paddy fields as a biofertilizer.
The dominant phase of the life cycle is represented by sporophyte which is differentiated into true stem, leaves, and roots.
Explanation:
