BOTANY Higher Secondary Second Year - Textbooks Online

made up of barrel shaped parenchyma cells. These cells are arranged in
a single layer without intercellular spaces. Pericycle occurs between
the endodermis and the vascular bundles. It is generally made up of
parenchyma cells. Lateral roots originate from the pericycle. Thus their
origin is endogenous. The central part of the ground tissue is known as
pith or medulla. Generally this is made up of thin walled parenchyma
cells which may be with or without intercellular spaces. The cells in the
pith generally store starch, fatty substances, tannins, phenols, calcium
oxalate crystals, etc.
Self evaluation
I . Choose and write the correct options.
1. The change from meristematic tissue to permanent tissue is called
a. differentiation. b. self perpetuating
c. photosynthesis. d. cell division.
2. The type of tissue presents in the petioles of banana and Canna,
is
a. stellate parenchyma b. prosenchyma
c. aerenchyma d. chlorenchyma.
3. The tissue generally present in all organs of plant is
a. parenchyma b. chlorenchyma
c. collenchyma d. sclerenchyma
4. The lamellar collenchyma is seen in the hypodermis of
a. Datura b. Helianthus
c. Ipomoea d. Nicotiana
5. The root hairs are produced from
a. rhizodermis b. trichomes
c. accessory cells d. trichoblasts
6. The osteosclereids are seen in
a. seed coat of Crotalaria b. see coat of Pisum
c. pulp of Pyrus d. petioles of banana
7. Bicollateral vascular bundles are seen in the members of
a. Malvaceae b. Musaceae
c. Solanaceae d. Cucurbitaceae
81