Dicot leaves are ____________and monocot leaves are _______________.

  • hypostomatic and amphistomatic

  • amphistomatic and hypostomatic

  • Astomatic and amphistomatic

  • epistomatic and hypostomatic

Secondary growth is because of

  • vascular cambium

  • cork cambium

  • lateral meristem

  • All of the above

Interfascicular cambium is formed from

  • medullary rays

  • intrafascicular cambium

  • cork cambium

  • pericycle

Vascular cambium includes

  • only intrafascicular cambium

  • only interfascicular cambium

  • Both intrafascicular and interfascicular cambium

  • cork cambium

The cells which are formed from vascular cambium towards the centre are____________and towards the periphery are _________________

  • secondary xylem, secondary phloem

  • bast, wood

  • wood, bast

  • Both A and C

The secondary xylem is produced more because

  • cambium is more active towards the inner side

  • cambium is more active towards the outer side

  • xylem is more important than phloem

  • All of the above

The primary and secondary phloems get gradually crushed because of

  • continuous formation and accumulation of  secondary xylem

  • discontinuous formation and accumulation of secondary xylem

  • by pressure of secondary xylem as they are continuously formed   

  • Both A and C    

Primary xylem remains less or more intact towards the __________

  • around the centre

  • around the periphery

  • outer to the pith

  • Both A and C

Which one is correct for spring wood

  • It is formed due more activity of cambium

  • It produces more xylary elements having vessels with wider cavities

  • It is also called as early wood

  • All of the above

Which one is correct for autumn wood

  • It is formed due less activity of cambium

  • It produces fewer xylary elements having  narrow vessels

  • It is also called as late wood

  • All of the above

The early wood is ___________ in color and late wood is ____________ in color.

  • lighter, darker

  • darker, lighter

  • lighter, lighter

  • darker, darker

The early wood has ___________ density and late wood has ____________ density.

  • lower, higher

  • higher, lower

  • lower, lower

  • higher, higher

Which one is true for annual ring

  • A ring of autumn wood and a ring of spring wood constitute annual ring

  • It appears as alternate concentric ring

  • It gives an estimate of the age of the tree.

  • All of the above

Heartwood is

  • dark brown in color

  • contains organic compounds like tannin, resins, gums, oils

  • known as duramen

  • All of these

How many of the statements are  true for heartwood

a. It provides mechanical support to the stem

b. It does not conduct water

c. It is hard, durable and resistant to the attacks of microbes

d. It is the innermost layer of the wood

e. It comprises dead elements with highly lignified walls

f. More the heartwood is present the better is the quality of the wood

  • 4

  • 5

  • 6

  • 3

Which one is true for sapwood

  • It lies in the peripheral region of xylem

  • It does conduction of water and minerals

  • It is also called as alburnum

  • All of the above

Cork cambium gives rise

  • cork

  • phelloderm

  • phellem

  • All of the above

Periderm comprises of

  • Phellem

  • phellogen

  • phelloderm

  • All of these

The dead cells which are formed towards the epidermis by cork cambium are called as

  • cork

  • phellem

  • phelloderm

  • Both A and B

The chloroplast containing parenchymatous cells which are formed towards the innerside by cork cambium are called as

  • secondary cortex

  • phelloderm

  • phellem

  • Both A and B

Which one is true for phellogen

  • thick layer cells

  • narrow, thin walled and nearly rectangular cells

  • gives rise to phellem and phelloderm

  • All of the above

Incorrect match is

  • Phellogen  = cork cambium

  • Phellem = Cork

  • Phelloderm=cortex

  • Phelloderm=Secondary cortex

In plants the replacement of the outer cortical and epidermal layers when they are broken are because of the

  • Cork cambium

  • vascular cambium

  • Phellogen

  • Both A and C

The cork is impervious to ______due to __________deposition in the cell wall.

  • water, suberin

  • water, lignin

  • water, wax

  • water, cellulose

Bark non-technically refers to tissues which lies

  • exterior to vascular cambium

  • exterior to cork cambium

  • exterior to primary phloem

  • All of the above

How many of the followings constitute the bark?

( secondary phloem, secondary cortex, cork cambium, complimentary cells, epidermis, periderm )

  • 6

  • 5

  • 4

  • 3

Which of the following is true for lenticels

  • lens shaped opening

  • occur in most woody trees

  • permit exchange of gases

  • All of the above

The function of lenticels are

  • exchange of gases

  • helps in transpiration

  • helps in vegetative reproduction

  • Both a and b

In dicot root the complete ring of vascular bundle is formed by

  • conjunctive tissue

  • pericycle

  • Endodermis

  • Both A and B

The shape of the vascular bundle is __________in the beginning and later it becomes ___________in dicot root.

  • wavy, circular

  • circular, wavy

  • circular , rectangular

  • wavy, and trapezoid

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Practice Botany Quiz Questions and Answers