Tag: identifying the plants
Questions Related to identifying the plants
Which is the plant with edible root?
-
Carrot
-
Tapioca
-
Turnip
-
All of the above
In some plants, root get modified for storage and are of mainly four types:-
Ex- carrot.
B)Fusiform roots -Swollen at middle and narrow toward its both ends.
Ex- radish.
C)Napiform roots-Globular or spherical shape. the basal portion is much swollen which suddenly tapers towards the apex giving the apex a top shaped appearance.
Ex- turnip and beet.
D)Tuberous roots -These are adventitious roots swollen without any definite shape.
Ex- sweet potato and tapioca.
So the correct option is 'All of the above'
The tap root system is composed of
-
Fibre like parts in the roots
-
Main root and lateral roots
-
Thread like branches attached to the base of stem
-
All of the above
The taproot is the primary root which develops from the elongation of the radicle of the embryo and persists throughout the life of the plant. It forms lateral or secondary roots which further divided to form tertiary roots.
The roots are important parts of the plant because
-
The roots provide anchorage
-
The roots help in making food
-
The roots absorb water
-
Both A and C
Functions of root:-
- It helps in the absorption of water and mineral.
- Holds the soil hence provide anchorage.
- Modify to store food.
- In hydrophytes helps to take oxygen called pneumatophores.
- Provide support to the plant body.
Reticulate venation is found in the plants with
-
Tap root system
-
Fibrous root system
-
Branched root system
-
Both A and C
A plant which does not have roots is?
-
Utricularia
-
Nelumbo
-
Trapa
-
Avicennia
Utricularia is an insectivorous plant. It does not have roots because it is specially modified to trap insects for feeding, so its vegetative organs are not seperated into roots stems and leaves.
Herbaceous plant that dies back to ground each year but sprouts again from under ground parts is?
-
Perennial
-
Biennial
-
Annual
-
Winter annual
A. Herbaceous plant in which the underground part of the plant is alive and survive through unfavourable conditions and then sprout above the ground later are perennial. For example, Piper nigrum etc.
Lateral roots originate from
-
Cortex
-
Epidermis
-
Endodermis
-
Pericycle
$\to$ Endodermis is followed by one or more layers of pericycle.
Which of the following is true?
-
Stem branches are endegenous
-
Stem branches develop from pericycle
-
Root branches are exogenous
-
Root branches are endogenous
- The parts which arise from the cortical region or the cortex are called exogenous in origin.
- The parts which arise from the pericycle are called endogenous origin.
- The lateral roots or root branches originate endogenously as they originate from the pericycle.
- So, the correct answer is 'Root branches are endogenous'
Root cap is formed by
-
Dermatogen
-
Calyptrogen
-
Wound cambium
-
Vascular cambium
A. Dermatogen is the primary meristem that forms the outer most layer of a plant or a plant part and forms the epidermis.
Root apex has a zone of slow dividing cells in the middle of rapidly dividing cells. It is
-
Quiescent centre
-
Sluggish centre
-
Dormant centre
-
Non-meristematic zone
- The root-promeristems that contain the initials of epidermis, cortex and stele is known as Quiescent centre.
- These cells divide less frequently as they are inactive and are present at the pole of cortex and stele.
- The cells with QC have small dictyosomes, nuclei and nucleoli with little cytoplasm.
- These cells also have little endoplasmic reticulum, mitochondria and contain low concentrations of RNA, DNA and protein than the other cells of the root apex.
- So, the correct answer is 'Quiescent centre'