11TH CBSE BIO Anatomy of Flowering Plants QUS ANS AUGUST 8

Write the location of root apical meristem and shoot apical meristem

Root apical meristem - Root Tip
Shoot apical meristem - Topmost regions of stem axis.
Give two examples of lateral meristem in plants.
Fascicular combium and phellogen ( cork cambium).
Product of phototsynthesis is transported from the leaves to various parts of the plant and stored in some cells before being utilised. What are the cells/tissues that store them?
Parenchyma cells/tissue.
How are the adjacent parenchyma cells are connected to each other?
By Plasmodesmata or cytoplasmic bridges.
What is the composition of collenchyma cells ?
It is made of cellulose, hemicellulose and pectic substances
Wall thickenings are uneven in which tissues ?
Collenchyma, it is present only at corners of cells
How vascular tissue system originate ?
It develops from part of pleurome or procambium

The only living component of xylem is what?
Xylem parenchyma
How the vessel members in xylems are interconnected ?
The vessel members are interconnected through perforations in their end/common walls.
Protoxylem is the first formed xylem. if the protoxylem lies next to phloem, what kind of arrangement of
xylem would you call it ?
Exarch
What is the function of phloem parenchyma ?
It stores food materials, resins, latex and mucilage.
Arrange the following in the sequence you would find them in a plant starting from the periphery:
phellem phellogen, phelloderm.
Phellem, Phellogen, Phelloderm.
What is the epidermal cell modification in plants which prevent water loss?
Cuticularised trichoblasts or epidermal hair which produce a stationary layer of air over the surface that reduces isolation and rate of transportation
Give two examples of fruits having scelerids ?
Pulp of the guava and pear
What is the common name of root epidermis ?
Epiblema
In how many zones, the ground tissue system is differentiated ?
In three major zones, i.e., cortex pericycle and pith with medullary rays.
Why is the root's apical meristem is subterminal ?
The presence of root cap makes the root's apical meristem subterminal
Where are apical meristems located?
Apical meristems are located at the tips of root and shoot.
What is the function of apical meristems ?
Apical meristems are responsible for the growth in length of roots and shoot
What is the other name of bulliform cells?
Motor cells
Do all stem have lenticels?
No, lenticels are mostly found in woody trees.
Name the term used to describe the vascular bundles in which phloem lies at the center and is
surrounded by the xylem?
Amphibasal
Why is cambium called as lateral meristem?
The cambium lies parallel to the circumference and helps to increase in girth , hence is called as lateral meristem

In which vascular bundles , phloem lies on the outerside and xylem towards the inner side or central axis?
Collateral vascular bundles
State the location and function of differnt types of meristerms.
Answer : Meristerms are divided into three types i .e ., apical meristerm, intercalary meristerm and lateral meristerm.
Distinguish between Collenchyma and sclerenchyma.
Answer : Collenchyma and sclerenchyma are types of simple permanent tissues.
Large number of stomata are seen on lower surface of dicot leaves or on the upper surface?
Answer : The stomata are more in number in the lower epidermis than the upper epidermis.
Differentiate between earlywood and latewood?
Answer : Earlywood is the another name of springwood and latewood is another name of
autumnwood.
How the study of anatomy is useful to us ?
Answer : The study of anatomy helps to us in
(i) solving taxonomic problems.
(ii) analysing the microstructure , adulteration of spice, tea, tobacco, etc.
(iii) extraction of compounds for use as medicine.
(iv) differentiation of inferior quality wood from the superior quality.
Name those parenchymatous cells which are associated with sieve tube in angiosperms. Mention their roll also
Answer : Companion cells are associated with sieve tube in the angiosperms. They help sieve tubes in the translocation
Which kind of tissue stores starch in potato and makes the shells of nuts ?
Answer : Parenchymatous tissue store starch (food) in potato and sclerenchymatous tissue make the shells of the nuts