Biology ยท Science General
Botany and Plant Science
5,038 Questions
Botany and plant science delve into the biological study of plant life, covering structural anatomy, physiological processes, and reproductive mechanisms. Key topics include inflorescence patterns, root modifications, and seed development, which are vital for biology sections in medical entrance exams. This collection of practice questions helps solidify understanding of complex plant functions.
Plant ReproductionPlant AnatomyRoot ModificationsInflorescence PatternsPlant Morphology
Botany and Plant Science Questions
-
Xylem fibers
-
Xylem tracheids
-
Xylem tracheae
-
Xylem parenchyma
D
Correct answer
Explanation
Xylem parenchyma is the only living component of xylem tissue. It is represented by groups of parenchyma cells that are found in between the vessels and the fibers. They are meant for storage of reserve food.
-
haplostele
-
actinostele
-
plectostele
-
eustele
C
Correct answer
Explanation
Plectostele is a protostele in which plate-like regions of xylem appear in transverse section surrounded by phloem tissue.
-
The leaves and stems of many ferns.
-
The roots of vascular plants.
-
The stems of seed plants.
-
It is not found anywhere at present.
D
Correct answer
Explanation
The Centrarch pattern was common in early land plants, such as rhyniophytes, but is not present in any living plants.
-
In endarch pattern
-
In exarch pattern
-
In mesarch pattern
-
In centrarch pattern
B
Correct answer
Explanation
The metaxylem is closest to the centre of the stem or root and the protoxylem to the periphery in exarch pattern of protoxylem and metaxylem arrangement.
-
Osteosclereides
-
Macrosclereides
-
Astrosclereides
-
Brachysclereides
B
Correct answer
Explanation
Macrosclereides are present in the epidermal covering of legumes.
-
laticiferous tissue
-
hypodermis
-
root epidermis
-
endodermis
C
Correct answer
Explanation
The root epidermis is also called piliferous layer because it bears root hair.
-
Leptocentric
-
Hydrocentric
-
Radial
-
Bicollateral
B
Correct answer
Explanation
In ferns, hydrocentric vascular bundles are found. In these, phloem surrounds the xylem, thus xylem is in the centre.
-
companion cells
-
sieve tubes
-
bast
-
callose
C
Correct answer
Explanation
Phloem cells are also known as bast.
-
Cortex
-
Pericycle
-
Cambium
-
Medulla
C
Correct answer
Explanation
Cambium is a part of vascular tissue system.
-
pectin
-
lignin
-
wax
-
protein
B
Correct answer
Explanation
Cell wall of sclerenchymatous tissue is coated with lignin, which provides strength.
-
They are sclerenchymatous fibres associated with xylem.
-
They are sclerenchymatous fibres associated with cortex.
-
They are sclerenchymatous fibres associated with phloem.
-
They are cutinised parenchymatous cells.
C
Correct answer
Explanation
Bast fibers are sclerenchymatous fibres associated with phloem.
-
lignin
-
pectin
-
suberin
-
resin
B
Correct answer
Explanation
In collenchyma cells, the thickening of corners is made up of pectin.
-
Epidermis of leaf
-
Chlorophyll found in some stems
-
Ground tissue system of leaves
-
Cells underneath epidermis of leaf
C
Correct answer
Explanation
Mesophyll is the ground tissue system of leaves. It is made up of two types of photosynthetic cells, i.e. pallisade and spongy.
-
sclerenchymatous cells
-
collenchymatous cells
-
parenchymatous cells
-
chlorenchymatous cells
B
Correct answer
Explanation
In dicots, the hypodermis occurs as one or more continuous layers of collenchymatous cells.
-
Pith
-
Cambium
-
Cortex
-
Phloem
B
Correct answer
Explanation
Cambium is an example of lateral meristem.