Quiz - biology - Anatomy of Flowering Plants-A & R Questions

Q1.

Assertion (A): Within angiosperms, the monocots and dicots show difference in their internal structure.

Reason (R): Both monocots and dicots show diverse environmental adaptations.

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Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q2.

Assertion (A): Both apical and intercalary meristems are primary meristem.

Reason (R): They appear early in life of plant and contribute to the formation of primary plant body.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q3.

Assertion (A): Simple permanent tissues are homogenous tissue.

Reason (R): Simple permanent tissue is made up of cells similar in structure and function.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q4.

Assertion (A): Pits are present on cell wall of sclerenchyma.

Reason (R): Sclerenchymatous cells show deposition of lignin in discontinuous manner.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q5.

Assertion (A): Xylem is conducting as well as mechanical tissue.

Reason (R): Xylem helps in transportation of water, minerals and show deposition of lignin on wall of their constituents.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q6.

Assertion (A): Both tracheids and vessels are devoid of protoplasm.

Reason (R): Both tracheids and vessels have to produce physical forces for ascent of sap so death of protoplasm is prerequisite.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q7.

Assertion (A): Ontogenically tracheids are unicellular and vessels are multicellular.

Reason (R): Tracheids are made up of single cell while vessel is made up of several vessel elements.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q8.

Assertion (A): companion cells are essential for functioning of sieve tubes.

Reason (R): The companion cells help in maintaining the pressure gradient in sieve tubes.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q9.

Assertion (A): Epidermal stem hairs are of multicellular nature.

Reason (R): They are of absorptive nature.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q10.

Assertion (A): Ground tissue system is the fundamental tissue system of plant body.

Reason (R): Majority of the plant body is consisted of ground tissue system.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q11.

Assertion (A): In roots vascular bundles show radial arrangement of xylem and phloem.

Reason (R): In roots arrangement of xylem and phloem on different radii facilitates absorption process.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q12.

Assertion (A): The tangential as well as radial walls of the endodermal cells have a deposition of impermeable suberin.

Reason (R): Endodermis is the biological check point where entry and exit of useful substances is governed.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q13.

Assertion (A): Stem branches are exogenous in origin.

Reason (R): Stem branches arise from pericycle.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q14.

Assertion (A): Vascular cambium of dicot stem shows dual origin.

Reason (R): Partially it is made up of primary meristem and partially from secondary meristem.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q15.

Assertion (A): Old woody plant parts are devoid of primary phloem.

Reason (R): Primary phloem get crushed due to continuous formation and accumulation of secondary xylem & secondary phloem.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q16.

Assertion (A): In autumn wood xylary elements are more and having wider cavity.

Reason (R): In autumn wood there is less deposition of lignin on xylary elements.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q17.

Assertion (A): Annual rings do not provide accurate estimation of age of plants.

Reason (R): Sometimes false annual rings can also arise due to mechanical pressure and jerks.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q18.

Assertion (A): Number of sap wood cells remain constant, while of heart wood gradually increases.

Reason (R): Heart wood arises earlier than sap wood.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q19.

Assertion (A): Cork is impervious to water.

Reason (R): It shows deposition of suberin on cell membrane.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q20.

Assertion (A): Although lenticels are involved in gaseous exchange yet they do not found on leaves.

Reason (R): Lenticels are result of secondary growth while leaves do not show secondary growth.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q21.

Assertion (A): Vascular cambium ring of roots is circular from beginning.

Reason (R): Cambium ring of roots arise from continuous pericycle ring from their same face.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q22.

Assertion (A): Cotton fibres are not true fibres.

Reason (R): Cotton fibres are not lignified.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q23.

Assertion (A): Most distinct annual rings are formed in tropical regions

Reason (R): Climatic variations are sharp in tropical regions

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q24.

Assertion (A): In a hollow stem no vital function is affected.

Reason (R): In hollow stem heart wood is perish out and heart wood do not perform any vital function

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q25.

Assertion (A): Mature sieve tube element is enucleated.

Reason (R): At maturity, nucleus is absent in sieve tube element.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q26.

Assertion (A): Periderm includes cork, secondary cortex and cork cambium.

Reason (R): Periderm is formed due to activity of vascular cambium.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q27.

Assertion (A): Commercial cork obtained from Quercus suber is a dead tissue with thickened walls by the deposition of suberin

Reason (R): Dendrochronology is the determination of age of a tree by counting the annual rings.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q28.

Assertion (A): In dicot stem, endodermis is also referred to as the starch sheath.

Reason (R): The cells of endodermis are rich in starch grains.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q29.

Assertion (A): In root primary xylem is of exarch nature.

Reason (R): In roots their main function is water absorption and due to their thin wall protoxylem is more efficient then metaxylem.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q30.

Assertion (A): Guard cells of stomata are having thick and elastic cell wall.

Reason (R): Elastic wall is due to radial arrangement of cellulose microfibrils.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q31.

Assertion (A): Suberization leads to death of cell.

Reason (R): Suberin is water resistant material.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q32.

Assertion (A): Monocots do not form secondary tissues.

Reason (R): The vascular bundles have no cambium present in them.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q33.

Assertion (A): Secondary growth takes place in dicot stems but not in monocot stems.

Reason (R): Hypodermis is collenchymatous in dicot stems while it is sclerenchymatous in monocot stems.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

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Biology - Anatomy of Flowering Plants-A & R Questions

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Biology - Anatomy of Flowering Plants-A & R Questions

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