← Back to Botany

Anatomy Of Flowering Plants

212 Questions Start Allen Test
All Exams Allen
Q176 Allen (B) ANALYTICAL QUESTIONS MCQ
Statement-I: in dicot stem, cork cambium develop usually in steler region. Statement-II :cork cambium cuts off phelloderm on outside and phellem on inner side.
A.
statement-I & statement-II both are correct
B.
statement-I is correct & statement-II is incorrect
C.
statement-I is incorrect & statement-II is correct
D.
Both statement-I & statement-II is incorrect.
Q177 Allen (B) ANALYTICAL QUESTIONS MCQ
At certain regions, the phellogen cuts off closely arranged parenchymatous cells on the outer side instead of cork cells. These are called :-
A.
Phellem
B.
Periderm
C.
Bark
D.
Complimentary cells
Q178 Allen (B) ANALYTICAL QUESTIONS MCQ
The cells of secondary cortex are :-
A.
Sclerenchymatous
B.
Parenchymatous
C.
Collenchymatous
D.
Meristematic
Q179 Allen (B) ANALYTICAL QUESTIONS MCQ
In dicot root, the vascular cambium is.
A.
Primary in origin
B.
Completely secondary in origin
C.
Both primary and secondary in origin
D.
Neither primary nor secondary in origin
Q180 Allen (B) ANALYTICAL QUESTIONS MCQ
Due to continuous growth of secondary xylem which of the following get crushed gradually
A.
Primary phloem
B.
Earlier formed secondary phloem
C.
Either (1) or (2)
D.
Both (1) and (2)
Q181 Allen (B) ANALYTICAL QUESTIONS MCQ
After secondary growth what is the actual future of primary xylem?
A.
Converts into secondary xylem
B.
Remains more or less intact in or around the centre
C.
Converts into secondary phloem
D.
Gets crushed
Q182 Allen (B) ANALYTICAL QUESTIONS MCQ
In plants, during early embroyonic condition
A.
All cells of the embryo divide
B.
Meristematic activity is confined to single apical cell
C.
Meristematic activity is confined to a group of apical cells.
D.
Apical & lateral cells only divide
Q183 Allen (B) ANALYTICAL QUESTIONS MCQ
Statement-I: In old trees, the greater part of secondary Xylem is dark brown due to deposition of organic compounds like tannins, resins, oils, gum, aromatic substances and essential oils. Statement-II : The peripheral region of secondary phloem is lighter in colour and is also known as sapwood.
A.
Statement-I & Statement-II both are correct.
B.
Statement-I is correct & Statement-II is incorrect.
C.
Statement-I is incorrect & Statement-II is correct.
D.
Both Statement-I & Statement-II is incorrect.
Q184 Allen (B) ANALYTICAL QUESTIONS MCQ
Identify the correct match from the column I and II :-
Column-IColumn-II
(a)Dicot stem
(b)Monocot stem
(c)Monocot root
(d)Dicot root
(i)Tetrach
(ii)Polyarch
(iii)Starch sheath
(iv)Scattered vascular bundle
A.
$a \to \mathrm{iii}; b \to \mathrm{iv}; c \to \mathrm{ii}; d \to i$
B.
$a \to \mathrm{iii}; b \to \mathrm{iv}; c \to \mathrm{i}; d \to \mathrm{ii}$
C.
$a \to \mathrm{iv}; b \to \mathrm{iii}; c \to \mathrm{ii}; d \to i$
D.
$a \to ii$ ; $b \to i$ ; $c \to iii$ ; $d \to iv$
Q185 Allen (B) ANALYTICAL QUESTIONS MCQ
Sieve plates in angiosperms are -
A.
Oblique & in lateral walls
B.
Pitted & in end wall
C.
Oblique & in end wall
D.
Straight & in lateral wall
Q186 Allen (B) ANALYTICAL QUESTIONS MCQ
Assertion :- Amount of secondary xylem is produced more than secondary phloem Reason :- The cambium is generally more active on the inner side than on the outer
A.
Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B.
Both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C.
Assertion is True but the Reason is False.
D.
Both Assertion & Reason are False.
Q187 Allen (B) ANALYTICAL QUESTIONS MCQ
T.S. of a material exhibits conjoint, collateral endarch and closed bundles scattered in a ground tissue what should be the material -
A.
Monocot root
B.
Dicot root
C.
Monocot stem
D.
Dicot stem
Q188 Allen (B) ANALYTICAL QUESTIONS MCQ
In respect of many grasses, the presence of bulliform or motor cells in the upper epidermis of leaves is to:-
A.
Increase the surface area of the leaf
B.
Store large amount of water
C.
Check transpiration by reducing the surface area of the leaf
D.
Bear unicellular trichomes
Q189 Allen (B) ANALYTICAL QUESTIONS MCQ
Heart wood of most of the woody trees, fails to conduct sap due to the obstruction by?
A.
Excess secondary wall deposition
B.
Storing a variety of material by tyloses
C.
Deposition of reserved food material
D.
Ray parenchyma
Q190 Allen (B) ANALYTICAL QUESTIONS MCQ
The trees growing in deserts will -
A.
Show alternate rings of xylem and sclerenchyma
B.
Show distinct annual rings
C.
Not show distinct annual rings
D.
Have only conjunctive tissue and phloem formed by the activity of cambium
Q191 Allen (B) ANALYTICAL QUESTIONS MCQ
Sap wood differ from heart wood in being -
A.
Darker and non-conducting
B.
Softer and non-conducting
C.
Lighter and conducting
D.
Harder, darker and less conducting
Q192 Allen (B) ANALYTICAL QUESTIONS MCQ
If a stem is girdled-
A.
Root dies first
B.
Shoot dies first
C.
Both die together
D.
None of the above die
Q193 Allen (B) ANALYTICAL QUESTIONS MCQ
Spring wood (early wood) differs with autumn wood (late wood) in -
A.
Size of vessels and tracheids
B.
Thickness of cell wall
C.
Amount of wood
D.
All the above
Q194 Allen (B) ANALYTICAL QUESTIONS MCQ
Most conspicuous annual rings are formed in
A.
Temperate evergreen plants
B.
Tropical deciduous
C.
Temperate deciduous plants
D.
Tropical evergreen
Q195 Allen (B) ANALYTICAL QUESTIONS MCQ
In dicot root which tissue becomes dead due to activity of phellogen
A.
All tissue outside cortex
B.
Tissue outside hypodermis
C.
Tissue outside endodermis
D.
Tissue outside pericycle
Q196 Allen (B) ANALYTICAL QUESTIONS MCQ
Physiologically functional part of wood is
A.
Heart wood only
B.
Sap wood only
C.
Only primary wood
D.
Both heart wood & sap wood
Q197 Allen (B) ANALYTICAL QUESTIONS MCQ
Find out the correct match.
A.
Spring wood-Wood formed during autumn, Autumn wood- Wood formed during spring, Hear wood-Lighter in colour
B.
Spring wood-Wood formed during spring season, Autumn wood-Wood formed during autumn season, Hear wood-Dead elements with highly lignified wall
C.
Spring wood-Late wood, Autumn wood-Early wood, Hear wood-Teloses
D.
Spring wood-Dark in colour, Autumn wood-Light in colour, Heart wood-Phellem
Q198 Allen (B) ANALYTICAL QUESTIONS MCQ
Which is not correct about heartwood
A.
It is formed of living cells
B.
It contains resins, tannin and other organic contents
C.
It is of dark coloured
D.
It lies in the central region of secondary xylem
Q199 Allen (B) ANALYTICAL QUESTIONS MCQ
Which of the following statements are correct :-
(a) In the spring season vascular cambium produce large number of xylary elements.
(b) Spring wood is lighter in colour with high density.
(c) In the winter season vascular cambium produce vessel with narrow lumen.
(d) Autumn wood is darker in colour with high density.
A.
a, b, c
B.
b, c, d
C.
a, c, d
D.
a, b, c, d
Q200 Allen (B) ANALYTICAL QUESTIONS MCQ
After two or three years of secondary growth the cortex in dicot roots
A.
Remains intact
B.
Is completely sloughed away
C.
Is largely lost
D.
Is converted into cork