MCQ ON PHYLLOTAXY / PHYLLOTAXY class 11 for NEET | PHYLLOTAXY class 11| MCQ PHYLLOTAXY with Answer | Check the below NCERT MCQ question for class 11Biology based on the with Answers.
MCQ on PHYLLOTAXY class 11Biology with answers were prepared based on the latest pattern. We have provided class 11 Biology MCQs question with Answers to help students understand the concept very well.
MCQ ON PHYLLOTAXY / PHYLLOTAXY class 11 for NEET
MCQ ON PHYLLOTAXY is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM/ KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2023-2024 ,2025
INTRODUCTION:-
PHYLLOTAXY:-
phyllotaxy is the pattern of arrangement of leaves on the stem or branch. This is usually of three types – alternate phyllotaxy , opposite phyllotaxy and whorled phyllotaxy.
Alternate phyllotaxy:- In alternate phyllotaxy type of phyllotaxy a single leaf arises at each node in alternate manner as in China rose, Mustard and sunflower plants.
Opposite phyllotaxy:- In opposite phyllotaxy a pair of leaves arise at the each node and lie opposite to each other as in calotropis and guava plants.
Whorled phyllotaxy:-
If more than two leaves arise at each node and a form a whole , it is called whorled as in Alstonia
CALYX:-
Calyx is the outermost whorl of the flower and the members are called sepals.
Generally , sepals are green , leaf – like and protect the flower in the bud stage.The calyx may be gamopetalous sepals united or polysepalous sepals free.
COROLLA:-
Corolla is composed of petals.Petals are usually brightly coloured to attract insects for pollination. Like calyx corolla may be also united gamosepalous petals united or polysepalous petals free.
The shape and colour of Corolla vary greatly in plants.
Corolla may be tubular , bell-shaped , funnel – shaped or wheel – shaped.
GYNOECIUM :-
Gynosium is the female reproductive part of the flower and is made of one more carpels.
A carpel consist of three parts namely stigma style and ovary.
Ovary is the enlarged basal part , on which lies the elongated tube, the style .
The style connects the ovary to the stigma.
Stigma is the usually tip of the style and is the receptive surface for pollen grains .
Each ovary bears one or more ovules attached to a flattened, cushion like placenta.
When more than one carpel is present , there may be free as in Lotus and rose and are called Apocarpous.
They are termed as Syncarpous when carpels are fused as in mustard and tomato.
After fertilisation , the ovules develop into seeds and the ovary matures into a fruit.
Androecium is composed of stamens.Each stamens which represents the male reproductive organ consists of a stalk or a filament and an anther.
Each anther is usually bilobed and each lobe has two chambers , the pollen sacs. The pollen grains are produced in pollen-sacs.A sterile stamen is staminode .
Stamens of flower may be united with other members such as petals or among themselves .
When stamens are attached to the petals , they are epipetalous as in brinjal
Epiphyllous when attached to the perianth as in the flower of Lily.
The stamens in a flower may either remain free ( polyandrous) or may be united in varying degrees .
The stamens may be united into bunch or one bundle ( monoadelphous) as in China rose or two bundles (diadelphous) as in pea , or into more than two bundles (polydelphous) as in citrus.
There may be variations in the length of filaments within a flower as in salvia and mustard.
MCQ ON PHYLLOTAXY class 11 for NEET/KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2023-2024,2025
1. The pattern of arrangment of leaves on the stem or branch.
(a) venation
(b) aestivation
(c) inflorescence
(d) phyllotaxy
Ans (d) phyllotaxy
2. Alternate, opposite and whorled are types of
(a) carpels
(b) stamen
(c) phyllotaxy
(d) sepals
Ans. (c) phyllotaxy
3.A single leaf arises at each node in alternate manner
(a) opposite phyllotaxy
(b) alternate phyllotaxy
(c) whorled phyllotaxy
(d) all the above
Ans. (b) alternate phyllotaxy
4.In china rose type of phyllotaxy found is
(a) alternate phyllotaxy
(b) opposite phyllotaxy
(c) whorled phyllotaxy
(d) all the above
Ans.(b) alternate phyllotaxy
5. Examples of alternate phyllotaxy are
(a) china rose, mustard and sunflower
(b) calotropis
(c) guava
(d) all the above
Ans.(a) china rose mustard and sunflower
6. A pair of leaves arise at each node and lies opposite to each other as is called
(a) alternate phyllotaxy
(b) opposite phyllotaxy
(c) whorled phyllotaxy
(d) all the above
Ans.(b) opposite phyllotaxy
7.Calotropis and guava plants are
(a) all the above
(b) opposite phyllotaxy
(c) whorled phyllotaxy
(d) alternate phyllotaxy
Ans.(b) opposite phyllotaxy
8.If more than two leaves arise at a node and form a whirl, it is called
(a) alternate phyllotaxy
(b) opposite phyllotaxy
(c) whorled phyllotaxy
(d) all the above
Ans.(c) whorled phyllotaxy
9. In Alstonia the type of phyllotaxy found is
(a) alternate phyllotaxy
(b) whorled phyllotaxy
(c) opposite phyllotaxy
(d) all the above
Ans. (b) whorled phyllotaxy
10. Phyllotaxy is the arrangement of ……….on stem or branch
(a) leaf
(b) petals
(c) stem
(d) root
Ans. (a) leaf
11.Which are not whorled phyllotaxy ?
(a) mustay
(b) China rose
(c) Alstonia
(d) both a and b
Ans.(d) both a and b
12. Which is not alternate phyllotaxy ?
a) mustard
b) china rose
c) sunflower
(d) Alstonia
Ans . (d) Alstonia
13. Which is not type of phyllotaxy?
(a) tendrils
(b) alternate
(c) opposite
(d) whorled
Ans.(a) tendrils
14. In alternate type of phyllotaxy howmany leaf arises at each node.
(a) a single leaf
(b) a double leaf
(c) a triple leaf
(d) all the above
Ans. (a) a single leaf
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15. In opposite phyllotaxy howmany leaf arises at each node.
(a) a pair of leaves
(b) a single leaf
(c) a triple leaf
(d) a tetra leaf
Ans.(a) a pair of leaves
16.Which are types of phyllotaxy?
(a) alternate
(b) opposite
(c) whorled
(d) all the above
Ans.(d) all the above
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