FILL IN THE BLANKS: 1. A stalk of a leaf is called a 2. The network of veins in
ID: 207806 • Letter: F
Question
FILL IN THE BLANKS: 1. A stalk of a leaf is called a 2. The network of veins in a leaf is referred to as the- .. 3. A compound leaf is a leaf whereby the leaflets occur in pairs along a rachis. 4. 5. Monocots have 6. When guard cells deflate due to loss of water, the stomata are 7. refers to the arrangement of leaves on a stem. -venation while dicots have mesophyll are loosely arranged parenchyma cells with abundant air spaces usually found close to the leafs lower epidermis. Leaves of plants adapted in arid regions reduce water loss by 8. a. b. c. d. 9. are modified leaves with reduced leaf surface as adaptive mechanisms to reduce water loss and prevent plants from herbivory. 10. are specialized leaves exemplified by an epiphyte (Dischidia) that develop into urn- like pouches that become home of ant colonies. are modified leaves that curl around more rigid objects helping the plant to climb or to support weak stems. 12. In thelayer of the abscission zone, pectins in the middle lamella of cells are broken down by enzymes.Explanation / Answer
According to given data,these are terms used in leaf study.
1. Petiole(stalk of leaf).
2.Venation (Network of vein in a leaf).
3.Pinnately compound leaf (leaflet in pairs along the rachis).
4.Phyllotaxy is arrangement of leaf on stem.
5.Monocot having(parallel venation),dicot having (reticulate or branched venation).
6.Guard cell during deflation,gets shrink dye to loss of turgor and hence stomata gets closed.
7.Spongy mesophyll in leaf anatomy,having large space in between them.
8.(a) Presence of thick cuticle.
(b).Succulent plant develop spines to protect them from thirsty animals.
(c)Different type of photosynthesis like CAM plant ,open their stomata during night.
(d) Position of leaf with respect to sunlight ,is slightly dorsal in plants of arid region.
9.Spines is modified leaf meant for protection from herbivores .Example -In babbul tree.
10.Bullate and imbricate are specialized leaf in Dischidia which is home for ants .
11.Tendrils are modified leaves help in plant climbing on a solid support.Example-vines.
12.Abscission layer of abscission zone ,in which pectin is broken by enzymes.
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