Question 1

Bracts are

Accepted Answer

A)  modified flower petals. 
B)  reproductive leaves. 
C)  found at the bases of flowers or flower stalks. 
D)  the general name for insect-trapping leaves. 
E)  leaves modified as spines. 
A)  modified flower petals. 
B)  reproductive leaves. 
C)  found at the bases of flowers or flower stalks. 
D)  the general name for insect-trapping leaves. 
E)  leaves modified as spines. C

Question 2

Which statement about venation is INCORRECT?

Accepted Answer

A)  Venation refers to arrangement of the veins within a leaf. 
B)  Venation patterns include pinnate, palmate and dichotomous. 
C)  Some flowering plants have leaves that lack venation even though the stems and roots have vascular bundles. 
D)  In general, monocots exhibit parallel venation. 
E)  Venation is important for delivering water to leaf cells and taking sugars to the stem. 
A)  Venation refers to arrangement of the veins within a leaf. 
B)  Venation patterns include pinnate, palmate and dichotomous. 
C)  Some flowering plants have leaves that lack venation even though the stems and roots have vascular bundles. 
D)  In general, monocots exhibit parallel venation. 
E)  Venation is important for delivering water to leaf cells and taking sugars to the stem. C

Question 3

All leaves originate as

Accepted Answer

A)  bud scales. 
B)  primordia. 
C)  axillary buds. 
D)  terminal buds. 
E)  stipules. 
A)  bud scales. 
B)  primordia. 
C)  axillary buds. 
D)  terminal buds. 
E)  stipules. B

Question 4

Leaf mesophyll consists primarily of chlorenchyma tissue.

Accepted Answer

A) True 
 B)False

Question 5

The jacket of cells surrounding a leaf vein is usually termed a/an

Accepted Answer

A)  bundle sheath. 
B)  protective parenchyma layer. 
C)  fiber-tracheid layer. 
D)  ray. 
E)  myelin sheath. 
A)  bundle sheath. 
B)  protective parenchyma layer. 
C)  fiber-tracheid layer. 
D)  ray. 
E)  myelin sheath.

Question 6

Which of the following is a function of a stoma?

Accepted Answer

A)  Diffusion of oxygen to the interior of a leaf. 
B)  Diffusion of carbon dioxide out of the leaf. 
C)  Allowing light to reach the interior of a leaf. 
D)  Facilitating transpiration. 
E)  All of these answers are correct. 
A)  Diffusion of oxygen to the interior of a leaf. 
B)  Diffusion of carbon dioxide out of the leaf. 
C)  Allowing light to reach the interior of a leaf. 
D)  Facilitating transpiration. 
E)  All of these answers are correct.

Question 7

Which of the following is primarily responsible for forcing water out of hydathodes?

Accepted Answer

A)  root pressures 
B)  transpiration 
C)  osmosis 
D)  photosynthesis 
E)  none of these answers are correct 
A)  root pressures 
B)  transpiration 
C)  osmosis 
D)  photosynthesis 
E)  none of these answers are correct

Question 8

Plants whose leaves fall off at the end of the growing season are

Accepted Answer

A)  partially evergreen. 
B)  conifers. 
C)  biennials. 
D)  deciduous. 
E)  dying. 
A)  partially evergreen. 
B)  conifers. 
C)  biennials. 
D)  deciduous. 
E)  dying.

Question 9

Which of the following insect-trapping leaves do NOT have active traps?

Accepted Answer

A)  sundews 
B)  pitcher plants 
C)  butterworts 
D)  bladderworts 
E)  Venus flytraps 
A)  sundews 
B)  pitcher plants 
C)  butterworts 
D)  bladderworts 
E)  Venus flytraps

Question 10

The plant part that facilitates a leaf blade being oriented at right angles to the sun is a/an

Accepted Answer

A)  stipule. 
B)  axillary bud. 
C)  terminal bud. 
D)  midrib. 
E)  petiole. 
A)  stipule. 
B)  axillary bud. 
C)  terminal bud. 
D)  midrib. 
E)  petiole.

Question 11

The opening and closing of stomata is governed by ______ levels in the guard cells.

Accepted Answer

A)  salt 
B)  chlorophyll 
C)  water 
D)  acid 
E)  sodium 
A)  salt 
B)  chlorophyll 
C)  water 
D)  acid 
E)  sodium

Question 12

Which of these plants produce leaves with chemicals that affect the behavior and/or mood of people?

Accepted Answer

A)  tobacco 
B)  tea 
C)  coca 
D)  marijuana 
E)  all of these 
A)  tobacco 
B)  tea 
C)  coca 
D)  marijuana 
E)  all of these

Question 13

In an energy-conscious world, people may plant more trees around their homes because ______________.

Accepted Answer

A)  they may use the trees for fuel 
B)  leaves of trees provide shade and reduce energy use for cooling homes 
C)  the leaves serve as insulation during winter 
D)  leaves may be composted for soil fertility 
E)  trees protect the roof from wind damage 
A)  they may use the trees for fuel 
B)  leaves of trees provide shade and reduce energy use for cooling homes 
C)  the leaves serve as insulation during winter 
D)  leaves may be composted for soil fertility 
E)  trees protect the roof from wind damage

Question 14

Stomata are part of this tissue.

Accepted Answer

A)  spongy mesophyll 
B)  palisade mesophyll 
C)  vascular bundles 
D)  epidermis 
E)  phloem parenchyma 
A)  spongy mesophyll 
B)  palisade mesophyll 
C)  vascular bundles 
D)  epidermis 
E)  phloem parenchyma

Question 15

Insectivorous plants trap and digest insects and other small organisms to get nitrogen which is lacking in the soils of their environments.

Accepted Answer

A) True 
 B)False

Question 16

In spines most of the normal leaf tissue is replaced with

Accepted Answer

A)  collenchyma. 
B)  chlorenchyma. 
C)  sclerenchyma. 
D)  ray cells. 
E)  cortex. 
A)  collenchyma. 
B)  chlorenchyma. 
C)  sclerenchyma. 
D)  ray cells. 
E)  cortex.

Question 17

The large cells of certain grass leaves that permit the leaves to roll up under dry conditions are

Accepted Answer

A)  pulvinar cells. 
B)  collenchyma cells. 
C)  bulliform cells. 
D)  aerenchyma cells. 
E)  aridophile cells. 
A)  pulvinar cells. 
B)  collenchyma cells. 
C)  bulliform cells. 
D)  aerenchyma cells. 
E)  aridophile cells.

Question 18

Which of the following may cause pectins in the middle lamella of cells of the separation layer to break down in the fall?

Accepted Answer

A)  Decreasing daylengths. 
B)  Lower temperatures. 
C)  Decreasing light intensities. 
D)  Lack of adequate water. 
E)  All of these answers are correct. 
A)  Decreasing daylengths. 
B)  Lower temperatures. 
C)  Decreasing light intensities. 
D)  Lack of adequate water. 
E)  All of these answers are correct.

Question 19

Which of the following is a typical characteristic of a shade leaf (as opposed to a leaf of the same plant that is fully exposed to the sun)?

Accepted Answer

A)  thicker blade 
B)  larger number of hairs 
C)  more chloroplasts 
D)  fewer, well-defined mesophyll layers 
E)  smaller in overall size 
A)  thicker blade 
B)  larger number of hairs 
C)  more chloroplasts 
D)  fewer, well-defined mesophyll layers 
E)  smaller in overall size

Question 20

The spongy mesophyll is so named because it

Accepted Answer

A)  has numerous intercellular spaces. 
B)  absorbs and holds quantities of water. 
C)  is soft and delicate and easily damaged. 
D)  is in the middle of the leaf. 
E)  both [absorbs and holds quantities of water and is soft and delicate and easily damaged] are correct 
A)  has numerous intercellular spaces. 
B)  absorbs and holds quantities of water. 
C)  is soft and delicate and easily damaged. 
D)  is in the middle of the leaf. 
E)  both [absorbs and holds quantities of water and is soft and delicate and easily damaged] are correct

Exam 7: Leaves

Bracts are

Which statement about venation is INCORRECT?

All leaves originate as

Leaf mesophyll consists primarily of chlorenchyma tissue.

The jacket of cells surrounding a leaf vein is usually termed a/an

Which of the following is a function of a stoma?

Which of the following is primarily responsible for forcing water out of hydathodes?

Plants whose leaves fall off at the end of the growing season are

Which of the following insect-trapping leaves do NOT have active traps?

The plant part that facilitates a leaf blade being oriented at right angles to the sun is a/an

The opening and closing of stomata is governed by ______ levels in the guard cells.

Which of these plants produce leaves with chemicals that affect the behavior and/or mood of people?

In an energy-conscious world, people may plant more trees around their homes because ______________.

Stomata are part of this tissue.

Insectivorous plants trap and digest insects and other small organisms to get nitrogen which is lacking in the soils of their environments.

In spines most of the normal leaf tissue is replaced with

The large cells of certain grass leaves that permit the leaves to roll up under dry conditions are

Which of the following may cause pectins in the middle lamella of cells of the separation layer to break down in the fall?

Which of the following is a typical characteristic of a shade leaf (as opposed to a leaf of the same plant that is fully exposed to the sun)?

The spongy mesophyll is so named because it

What Is Plant Biology

The Nature of Life

Cells

Tissues

Roots and Soils

Stems

Flowers, Fruits, and Seeds

Water in Plants

Plant Metabolism

Growth

Meiosis and Alternation of Generation

Genetics

Plant Breeding and Propagation

Evolution

Plant Names and Classification

Domain Kingdombacteria, Domain King-Domarchaea, and Viruses

Kingdom Protista

Kingdom Fungi

Introduction to the Plant Kingdom: Bryophytes

The Seedless Vascular Plants: Ferns and Their Relatives

Introduction to Seed Plants: Gymnosperms

Seed Plants: Angiosperms

Flowering Plants and Civilization

Ecology

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