leaves botany

Question 1

Leaves are flat
and thin for
maximum
absorption of

Answer 1

light and gas

Question 2

All leaves originate
as

Answer 2

primordia

Question 3

support
leaves to have and
ideal cylindrical
structure of foliage.

Answer 3

Stems

Question 4

large, flat,
green structure that
photosynthesizes

Answer 4

Leaf:

Question 5

Blade is
divided into
leaflets

Answer 5

COMPOUND

Question 6

With a single
blade

Answer 6

SIMPLE

Question 7

Leaflets in pairs along rachis (petiole)

Answer 7

Pinnately compound

Question 8

leaflets are further subdivided

Answer 8

Bipinnately compound

Question 9

All leaflets are attached at same point at the end of petiole

Answer 9

Palmately compound

Question 10

Play major role in movement of water absorbed by roots

Answer 10

leaves

Question 11

occurs when water evaporates from leaf surface.

Answer 11

Transpiration

Question 12

Root pressure forces water out hydathodes at tips of
leaf veins in some plants.

Answer 12

Guttation -

Question 13

attachment of leaves to stems

Answer 13

Nodes

Question 14

stem regions between two nodes.

Answer 14

Internodes

Question 15

Arrangement of leaves on stem

Answer 15

alternate, opposite, whorled

Question 16

one leaf per node

Answer 16

Alternate

Question 17

two leaves per node

Answer 17

Opposite

Question 18

three or more leaves per node

Answer 18

Whorled

Question 19

Main midvein included within enlarged midrib.

Secondary veins branch from midvein.

Answer 19

Pinnately veined leaves

Question 20

Several primary veins fan out from base of blade.

Answer 20

Palmately veined leaves

Question 21

Monocots

Primary veins are parallel

Answer 21

Parallel venation

Question 22

Dicots

Primary veins divergent in various ways

Answer 22

Netted / Reticulated venation

Question 23

Veins fork evenly and progressively from base of blade

Answer 23

Dichotomous venation

Question 24

Single layer of cells covering the entire surface of the leaf

Devoid of chloroplasts

Coated with cuticle (with cutin)

Functions to protect tissues inside leaves

Answer 24

Epidermis

Question 25

Lower epidermis typically has thinner layer of ______and is perforated by numerous _____

Answer 25

cutin and stomata.

Question 26

bordered by two guard cells.

Answer 26

Stomata

Question 27

originate from the same parent cell, and contain chloroplasts.

Answer 27

guard cells

Question 28

Regulate gas exchange between leaf interior and atmosphere Regulate evaporation of water

Answer 28

stomata

Question 29

Regulate gas exchange between leaf interior and atmosphere Regulate evaporation of water

Answer 29

stomata

Question 30

Most photosynthesis takes place in the

Answer 30

mesophyll

Question 31

Compactly stacked, barrel-shaped parenchyma cells, commonly in two rows Contains most of leaf’s chloroplasts

Answer 31

Palisade mesophyll

Question 32

Loosely arranged parenchyma cells with abundant air spaces

Answer 32

Spongy mesophyll

Question 33

partly collapse under dry conditions. Causes leaf to fold or roll, reducing transpiration

Answer 33

Bulliform cells

Question 34

Consist of xylem and phloem tissues surrounded by bundle sheath of thicker-walled parenchyma

Answer 34

Veins (vascular bundles)

Question 35

have limited availability of water, wide temperature ranges, and high light intensities.

Answer 35

Arid regions

Question 36

Less xylem and phloem Mesophyll not differentiated into palisade and spongy layers. Large air spaces

Answer 36

Leaves of Aquatic Areas

Question 37

Modified leaves that curl around more rigid objects, helping the plant to climb or to support weak stems

Answer 37

Tendrils

Question 38

Modified leaves that reduce leaf surface and water loss and protect from herbivory.

Answer 38

Spines

Question 39

Leaf tissue replaced with sclerenchyma. Photosynthesis occurs in stems

Answer 39

Cacti

Question 40

Modified stems arising in the axils of leaves of woody plants

Answer 40

Thorns

Question 41

Outgrowths from epidermis or cortex

Answer 41

Prickles

Question 42

are modified for water storage. Have parenchyma cells with large vacuoles Many desert plants

Answer 42

Succulent leaves

Question 43

store carbohydrates. Onions, lily

Answer 43

Fleshy leaves

Question 44

Leaves develop into urn-like pouches that become home of ant colonies.

Answer 44

Flower-pot leaves

Question 45

Leaves buried in ground, except for exposed end.

Answer 45

Window leaves

Question 46

- New plants at leaf tips

Answer 46

Walking fern

Question 47

Tiny plantlets along leaf margins

Answer 47

Air plant

Question 48

At bases of flowers or flower stalks

Answer 48

Floral Leaves

Question 49

Flowers do not have petals, instead brightly colored bracts surround flowers. Clary’s sage - Colorful bracts are at top of flowering stalks above flowers.

Answer 49

Poinsettia -

Question 50

Grow in swampy areas and bogs Nitrogen and other elements are deficient in soil. Specialized leaves trap and digest insects.

Answer 50

Insect-trapping leaves

Question 51

Insects trapped and digested inside cone-shaped leaves.

Answer 51

Pitcher Plant

Question 52

Have round to oval leaves covered with glandular hairs that have a sticky fluid of digestive enzymes at tip

Answer 52

Sundews

Question 53

Only in North Carolina and South Carolina Blade halves trap insects.

Answer 53

Venus Flytrap

Question 54

Submerged or floating in shallow water Tiny bladders on leaves have trap doors that trap insects inside bladders.

Answer 54

Bladderwort

Question 55

may also be present in the vacuole.

Answer 55

Water soluble anthocyanins (red or blue) and betacyanins

Question 56

drop leaves seasonally.

Answer 56

Deciduous plants

Question 57

Cells coated and impregnated with suberin.

Answer 57

Protective layer

Question 58

Pectins in middle lamella of cells are broken down by enzymes.

Answer 58

Separation layer