Anatomy Of Flowering Plants

Question 1

The cortex consists of several layers of thin-walled parenchyma cells without intercellular spaces.

Answer 1

False
They have intercellular spaces

Question 2

Statement 1: The innermost layer of the cortex is called endodermis

Statement 2: The tangential as well as radial walls of the endodermal cells have a deposition of water-impermeable, waxy material suberin in the form of casparian strips.

Answer 2

True

Question 3

Thick-walled parenchyomatous cells are present in………

Answer 3

pericycle

Question 4

Initiation of lateral roots and vascular cambium during the secondary growth takes place in these cells………

Answer 4

Pericycle cells

Question 5

There are usually two to four xylem and phloem patches.
Later, a cambium ring develops between the xylem and phloem
This is true for……..

Answer 5

Dicot root

Question 6

All tissues on the innerside of the endodermis such as pericycle, vascular bundles and pith constitute the…….

Answer 6

stele

Question 7

There are usually more than six (polyarch) xylem bundles in the………root

Answer 7

monocot

Question 8

In dicot stem The cells arranged in multiple layers between epidermis and pericycle constitute the…….

Answer 8

cortex

Question 9

The outer hypodermis, consists of a few layers of………. cells just below the epidermis, which provide mechanical strength to the young dicot stem.

Answer 9

collenchymatous

Question 10

Cortical layers below hypodermis consist of rounded thin walled…………cells with…………intercellular spaces.
Dicot stem

Answer 10

parenchymatous

conspicuous

Question 11

Statement 1: The innermost layer of the cortex is called the endodermis.
Statement 2: The cells of the endodermis are rich in starch grains and the layer is also referred to as the starch sheath.
[dicot stem]

Answer 11

Both are correct

Question 12

Pericycle is present on the inner side of the endodermis and above the phloem in the form of semi-lunar patches of……….
[dicot stem]

Answer 12

sclerenchyma

Question 13

The ‘ring’ arrangement of vascular bundles is a characteristic of……..stem.

Answer 13

dicot

Question 14

The…….. stem has a sclerenchymatous hypodermis,

Answer 14

monocot

Question 15

Peripheral vascular bundles are generally smaller than the centrally located ones in monocot stem

Answer 15

True

Question 16

Statement 1: The abaxial epidermis generally bears more stomata than the adaxial epidermis.
Statement 2: The latter may even lack stomata

Answer 16

Bothe are correct

Question 17

Statement 1: The adaxially placed palisade parenchyma is made up of elongated cells, which are arranged vertically and parallel to each other. Statement 2: The oval or round and loosely arranged spongy parenchyma is situated below the palisade cells and extends to the lower epidermis

Answer 17

Both are correct

Question 18

The vascular bundles are surrounded by a layer of thick walled bundle sheath cells in dicot leaf

Answer 18

True

Question 19

Statement 1; In an isobilateral leaf, the stomata are present on both the surfaces of the epidermis.
Statement 2: Also the mesophyll is not differentiated into palisade and spongy parenchyma

Answer 19

True

Question 20

Statement 1: When the bulliform cells in the leaves have absorbed water and are turgid, the leaf surface is exposed.
Statement 2: When they are flaccid due to water stress, they make the leaves curl inwards to minimise water loss.

Answer 20

Both are correct for a monocot leaf

Question 21

The parallel venation in monocot leaves is reflected in the near similar sizes of vascular bundles in the main veins
True or false

Answer 21

False
except in main veins