Download The leaf الورقة First Question: Choose the correct answer: 1) Petioles

The leaf ‫الورقة‬
First Question: Choose the correct answer:
1) Petioles of these leaves enlarge and their tissues are filled with air to
allow the plant float above the water surface :
a. Buoyant leaves .
b. Grasping leaves .
c. Protective leaves .
d. Storage leaves .
2) First true leaves to appear on the seedling, usually smaller than the
normal leaves :
a. Cotyledonany leaves .
b. Floral leaves .
c. Grasping leaves .
d. Prophyllis leaves .
3) Colored leaves modified to protect the flower bud:
a. Bract leaves .
b. Floral leaves .
c. Supporting leaves .
d. Grasping leaves .
4) Leaves are arranged opposite at each node, but each pair of leaves
is oriented perpendicular the pair at the next node:
a. Alternate .
b. Opposite .
c. Opposite decussate .
d. Whorled .
5) In this type of leaves, leaflets are arranged on opposite sides of an
elongation axis like a feather :
a. Compound palmate .
b. Compound pinnate .
c. Simple .
d. Pinnatipartite .
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Second Question:Answer with (√) or (×) in the following sentences
1) ( ) Leaves have a relatively long life span as compared to other
plant parts.
2) ( ) The phenomenon of Heterophylly is having more than one type
of leaf on the same plant.
3) ( ) Evergreen plants drop all their leaves in autumn and winter and
look bare.
4) ( ) Scaly leaves cannot perform photosynthesis because they lack
chlorophyll.
5) ( ) Stomata of dicotelydons are arranged in parallel rows.
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