Morphology in Flowering Plants Quiz-7

BIOLOGY MORPHOLOGY IN FLOWERING PLANTS QUIZ-7

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NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions. About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus. Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1. The bladder of Utricularia and pitchers of Nepenthes are modification of

•  Stems
•  Leaves
•  Roots
•  Flowers

Solution
b)In insectivorous plant Nepenthes, the lamina forms the pitcher, the lid represents the apex, and the petiole is tendrilar, whereas leaf base is flattened. In Utricularia, which is submerged floating hydrophyte, the leaves are dissected and some of the leaf segments get modified into tiny bladders

Q2.Which of the following statements are true/false?
I.Trimerous condition of floral whorl is characteristic of dicotyledons.
II.Adiantum is also called walking fern.
III.In gymnosperms, the vascular system consists of xylem without vessels and phloem with companion cells.
IV.Riccia and Marchantia are liverworts.

•  I and II are true and III and IV are false
•  I and III and true and II and IV are false
•  I and IV are true and II and III are false
•  II and IV are true and I and III are false

Solution
d) Option (d) is correct.

Q3.  Male reproductive organ (flower) consists of

•  Stalk
•  Thalamus
•  Anther
•  Both (a) and (c)

Solution
(d) Male reproductive organ stamin is consisted of stalk and anther. Androecium is composed of stamens. Each stamen which represents the male reproductive organ consists of stalk or a filament and an anther

Q4. Offset is a type of stem present in

•  Pistia
•  Colocasia
•  Oxalis
•  Potato

Solution
a)Offsets are only one internode long, thicker, small runners bearing a cluster of leaves in rosette manner above the water or ground level and adventitious roots below the water or ground level arising from all nodes, e.g., Pistia (water lettuce), Eichhornia crassipes (water hyacinth), etc.

Q5.Thorn is a modified branch because

•  It is hard, straight and pointed
•  It is a part of the plant
•  It arises in the axil of a leaf
•  It is a defensive organ

Solution
 (c) Thorn is a modified branch because it arises in the axil of a leaf.

Q6.Juicy hair-like structures observed in the lemon fruit develop from

•  Endocarp
•  Mesocarp and endocarp
•  Exocarp
•  Mesocarp

Solution
(a)In lemon, juicy hair-like structures develop from endcarp.

Q7.Cyathium inflorescence shows

•   Scorpioid cyme showing central female, many peripheral male flowers
•  Scorpioid cyme showing central male, many peripheral female flowers
•  Dichasial cyme showing two whorls of 3 to 9 flower
•  Dichasial cyme showing two whorls, one of male and another of female flowers

Solution
(a)In Cyathium inflorescence, five involucres become fused and form a cup-shaped structure, which surrounds a large, achlamydeous (sepals and petals are absent), pedicellate, tricarpellary and syncarpous female flowers. Numerous, achlamydeous pedicellate, centrifugally arranged and Scorpioid male flowers surround this flower. It is the characteristic. Inflorescence of genus-Euphorbia or family-Euphorbiaceae.

Q8.Which one of the following is an example for sub-aerial modification of stem?

•  Agave
•  Oxalis
•  Asparagus
•  Tridax

Solution
b)Oxalis (wood sorrel) is an example of runners, which are the sub-aerial weak stem modification. Runners are those creepers that grow horizontal or prostrate in all directions above the ground, possess long internodes and nodes bearing scale leaves and adventitious roots on the lower side.

Q9.Stems are

•  Positively phototropic
•  Negatively geotropic
•  Negatively hydrotropic
•  All of the above

Solution
(d)Positively phototropic, negatively geotropic, negatively hydrotropic are fundamental characters of stem

Q10. Which of the following is a fatty oil yielding plant?

•  Sunflower
•  Acacia
•  Butea
•  Casuarina

Solution
(a)Sunflower oil is a semi-drying oil obtained from Helianthus annuus which belongs to the family-Asteraceae. It’s seed contains 40-50% oil contents. On hydration it yields vegetable ‘ghee’. Sunflower oil is used in cooking and in manufacturing of paints and soaps.