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CBSE Questions for Class 11 Medical Biology Morphology Of Flowering Plants Quiz 18 - MCQExams.com
CBSE
Class 11 Medical Biology
Morphology Of Flowering Plants
Quiz 18
Family Liliaceae?
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Explanation
The flowers of liliaceae have 3 sepals, 3 petals, 6 stamens and a syncarpous gynoecium of 3 carpels; the overy can be superior or inferior. In a few genera the sepals and petals fuse into a tube and the stamens are epipetalous. Thus the correct option is D.
The inflorescence found in grasses and sedges is
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Compound spike
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Spikelet
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Catkin
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Spadix
Explanation
The inflorescence found in grasses and sedges is Spikelet. Spikelet is small , special type spike. Flowers are produced in the axil of fertile bracts called Lemma.
So, the correct option is 'Spikelet'.
Main component of middle lamella is?
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Magnesium pectate
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Calcium pectate
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Calcium carbonate
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Calcium oxalate
Explanation
The middle lamella is a pectin layer which cements the cell walls of two adjoining plant cells together. It is the first formed layer which is deposited at the time of cytokinesis. The cell plate that is formed during cell division itself develops into middle lamella or lamellum. In plants, the pectins form a unified and continuous layer between adjacent cells. Frequently, it is difficult to distinguish the middle lamella from the primary wall, especially in cells that develop thick secondary walls. The middle lamella is made up of calcium and magnesium pectates.
So the correct option is 'Mg pectate'.
Cymose inflorescence is ________.
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Definite
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Indefinite
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Verticillate
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Alternate
Explanation
The cymose inflorescence is characterized by the presence of a flower at the apex of the flower axis. The number of the flower is definite. The cymose inflorescence is also known as definite inflorescence because the growing point of the peduncle is used up in the formation of flower. In this type of arrangement older flower is present in the middle and the younger ones at the periphery.
so, the correct answer is '
Definite'
In which of the following organs, growth is subapical?
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Shoot
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Petiole
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Root
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Pedicel
Explanation
Roots grow in length only from the ends. The tip of the root is covered by a root cap, which gives protection to the growing tip as it makes its way through the soil. The root has a subapical region, which is divided into three zones. They are, the zone of cell division, the zone of elongation and the zone of cell maturation. The subapical region carries out the growth of the roots.
Hence, the correct answer is option C.
Match the following
Column-I
Column-II
(i)
Tap root
(a)
Sweet potato
(ii)
Adventitious root
(b)
Turnip
(iii)
Stem
(c)
Wheat
(iv)
Fibrous root
(d)
Potato
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(i) - a, (ii) - b, (iii) - c, (iv) d
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(i) - b, (ii) - c, (iii) - a, (iv) - d
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(i) - b, (ii) - a, (iii) - d, (iv) c
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(i) - d, (ii) - c, (iii) - b, (iv) - a
Explanation
(i)Taproot - (b)Turnip
A taproot is a large, central, and dominant root from which other roots sprout laterally. Typically a taproot is somewhat straight and very thick, is tapering in shape, and grows directly downwards. For example, Turnip, beetroot, carrot, etc.
(ii)Adventitious root -
(a)
Sweet potato
The
roots arise
from parts of the plant other than the
radicle and are called adventitious roots. For example, sweet potato.
(iii)Stem -
(d)
Potato
Stem tuber is a swollen tip of an underground lateral Stem (Stolon). It is covered by a corry Skin with a number of small depressions called eyes’. Each eye represents a node, bearing one or more buds subtended by a leaf scar (= scale leaf). A big scar at one end (heel end) of a potato marks its attachment to the stolen. Adventitious roots are usually absent. For example, Potato.
(iv)Fibrous root -
(c)
Wheat
A fibrous root system is the opposite of a taproot system. It is usually formed by thin, moderately branching roots growing from the stem. For example, G
rass, wheat, rice, marigold, white clover, maize, banana, millet, bamboo, and onion.
So, the correct answer is '
b'(i) - b, (ii) - a, (iii) - d, (iv) c''.
Liliaceae members with unisexual flowers are?
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Asparagus, Allium
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Smilax, Gloriosa
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Ruscus, Smilax
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Lilium, Allium
A fruit in which the pericarp is soft, pulpy mesocarp and hard endocarp enclosing the seed, is____________.
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Tomato
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Orange
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Pinapple
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Mango
Explanation
A fruit in which the pericarp is soft, pulpy mesocarp and hard endocarp enclosing the seed, is Mango.
Thus, Option D is correct.
Find out the correct statement according to figure.
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Have ligulate leaves
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Sporangia are formed in sporocarp
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It is homosporous plant
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Belong to smallest group of pteridophytes
Features like actinomorphic flower, axile placentation and endospermous seeds are common in
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Solanaceae and Liliaceae
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Liliaceae and Fabaceae
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Brassicaceae and Fabaceae
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Graminae and Liliaceae
Explanation
Flowers of solaneace and liliaceae family have actinomorphic flower I.e symmetrical, the fusing margins of gynoecium form an axis in the center of the ovary having axile placentation.
So, the correct option is A.
In some members of Rosaceae, Leguminosae and Solanaceae, pollen grains maintain viability for a month due to
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Sporopollenin
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Tectum
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Specific proteins
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Pectocellulosic intine
Explanation
In some members of Rosaceae, Leguminosae and Solanaceae pollen grains maintain viability for a month due to
sporopollenin
.
Cladodes are common among?
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Liliaceae/
Asparagus
and
Ruscus
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Opuntia
and
Casuarina
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Cactus
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Euphorbia
Explanation
Cladodes are flattened, photosynthetic shoots with limited growth which are usually considered to be modified branches with leaves reduced to scales or modified into spines. Example are
Ruscus
and
Asparagus.
So, correct answer is '
Liliaceae
/Asparagus
and
Ruscus'
Match the column I with column II and select the correct answer from the options given.
Column I
Column II
$$1$$. Albumin
(a) active enzyme
$$2$$. Globulin
(b) osmotic balance
$$3$$. Fibrinogen
(c) defense function
$$4$$. Thrombin
(d) inactive protein
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$$1234$$/abcd
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$$1234$$/bcad
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$$1234$$/bcda
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$$1234$$/dcba
Explanation
Albumin helps to maintain osmotic pressures between the blood and the tissue.
Globulin helps in fighting infection.
Fibrnogen in plant is an inactive protein.
Thrombin helps in chemotaxis.
So, the correct answer is C.
Primary root is very short lived and is replaced by a large number of thread like roots in
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Mango
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Maize
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Pea
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Beans
Explanation
Correct option-C
Explanation for correct option-C
Plants have two types of root systems - tap root system and fibrous root
.
In monocotyledonous plants
, the primary root is short-lived and is replaced by a large number of thread-like roots called fibrous roots.
Maize is a monocot.
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