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AP Bio, ch. 24

Plant tissues/organs
STUDY
PLAY
epidermal
_____ tissue forms the outer protective covering of a plant.
ground
_____ tissue fills the interior of a plant.
vascular
_____ tissue transports water and nutrients in a plant and provides support.
epidermis
The entire body of both non-woody (herbaceous) and young woody plants is covered by a layer of _____.
cuticle
The walls of epidermal cells that are exposed to the air are covered with a waxy _____ to minimize water loss.
root hairs
In roots, certain epidermal cells have long, slender projections called _____ _____.
trichomes
On stems, leaves, and reproductive organs, epidermal cells produce hairs called _____.
chloroplasts, stomata
Guard cells, which are epidermal cells with _____, surround microscopic pores called _____.
periderm
In older woody plants, the epidermis of the stem is replaced by _____.
cork
The majority component of periderm is boxlike _____ cells.
lenticles
Ridges and cracks that appear on the stem surface because of the overproduction of cork by cork cambium
parenchyma
_____ cells are the most abundant and correspond best to the typical plant cell. They are the least specialized of the cell types and are found in all organs of a plant.
collenchyma
_____ cells have thicker primary walls than parenchyma cells.
sclerenchyma
_____ cells have very thick walls and are nonliving--their only function is to give strong support.
lignin
Sclerenchyma cells have thick secondary cell walls impregnated with _____, which is a highly resistant organic substance that makes the walls tough and hard.
root system
simply consists of the roots
shoot system
consists of the stem, the branches, and the leaves
organs
structures that contain different tissues and perform one or more specific functions that allow them to live and grow
vegetative organs
The roots, stems, and leaves are the _____ _____.
vegetative organs
These organs are concerned with growth and nutrition...not reproduction
reproduction
Flowers, seeds, and fruits are structures involved in _____.
perennial
_____ plants have vegetative structures that live year after year
axillary
_____ buds can develop into branches of stems or flowers, the reproductive structures of a plant.
vascular
The root system is connected to the shoot system by _____ tissue (brown) that extends from the roots to the leaves.
stem
A _____, the main axis of a plant, has a terminal bud that allows the _____ to elongate and produce new leaves.
node
A _____ occurs where leaves are attached to the stem.
internode
The region between nodes is called an _____.
axillary
An _____ bud, located at anode in the upper angle between the leaf and the stem can produce new branches of the stem (or flowers).
leaves
_____ are the major part of a plant that carries on photosynthesis, a process that requires water, carbon dioxide, and sunlight.
evergreens, deciduous
Plants that bear leaves the entire year are called _____ and those that lose their leaves every year are called _____.
blade
The wide portion of a foliage leaf is called the _____.
petiole
The _____ is a stalk that attaches the blade to the stem.
cotyledons
Flowering plants are divided into two groups, depending on the number of _____, or seed leaves, in the embryonic plant.
star
In the eudicot root, the xylem, which transports water and minerals, is _____-shaped; and the phloem, which transports organic nutrients, is located between the points of the _____.
vascular
Leaf veins are _____ bundles within a leaf.
parallel, netted
Monocots exhibit _____ venation, and eudicots exhibit _____ venation, which may be either pinnate or palmate.
eudicots, monocots
In _____, there are two cotyledons in the seed, while in _____, there is one.
eudicots, monocots
In _____, the root phloem is between arms of xylem, while in _____, the root xylem and phloem are in a ring.
monocots, eudicots
In _____, the vascular bundles are scattered in the stem, while in _____, the vascular bundles are in a distinct ring.
monocots, eudicots
In _____, the leaf veins form a parallel pattern, while in _____, the leaf veins form a net pattern.
eudicots, monocots
In _____, the flower parts are in fours or fives and their multiples, while in _____, the flower parts are in threes and multiples of three.
meristems
_____ are located at or near the tips of stems and roots, where they increase the length of these structures-> primary growth
cuticle
This also protects against bacteria and other organisms that might cause disease.
hairs
_____ increase the surface area of the root for absorption of water and minerals; they also help anchor the plant firmly in place.
trichomes
_____ have two important functions: to protect the plant from too much sun and to conserve moisture, sometimes they even prevent form herbivores by producing a toxic substance.
guard
In leaves, the lower epidermis of eudicots and both surfaces of monocots contain specialized cells called _____ cells.
gas, water
When the stomata are open, _____ exchange and _____ loss occur.
cambium
New cork cells are made by a meristem called cork _____.
lenticels
_____ in cork are important in gas exchange.
absorb
Root epidermis has root hairs to _____ water.
collenchyma
_____ cells often form bundles just beneath the epidermis and give flexible support to immature regions of a plant body.
xylem
_____ transports water and minerals from the roots to the leaves
phloem
_____ transports sucrose and other organic compounds, including hormones, usually from the leaves to the roots.
complex
Both xylem and phloem are considered _____ tissues because they are composed of two or more kinds of cells.
xylem, vessel elements, tracheids, pits
_____ contains two types of conducting cells: tracheids and vessel elements, which are modified sclerenchyma cells. Both types of conducting cells are hollow and nonliving, but the _____ are larger, may have perforation plates in their end walls, and are arranged to form a continuous vessel for water and mineral transport. The elongated _____, with tapered ends, form a less obvious means of transport, but water can move across the end walls and side walls because there are _____, or depressions, where the secondary wall does not form.
phloem
The conducting cells of _____ are specialized parenchyma cells called sieve-tube members arranged to form a continuous sieve tube.
companion
Each sieve-tube member has a ____ cell, which does not have a nucleus. The _____ cell may control and maintain the life of both cells. _____ cells are also believed to be involved in the transport function of phloem.
cylinder, bundles, veins
In the roots, vascular tissue is located in the vascular _____; in the stem, it forms vascular _____; and in the leaves, it is found in leaf _____.
terminal
The _____ bud contains the shoot tip protected by bud scales, which are modified leaves.
apical meristem
The root _____ _____ is in the region protected by the root cap.
three
The root tip is divided into _____ zones.
eudicot
The vascular cylinder of a _____ root contains the vascular tissue.
xylem
Because of the Casparian strip, water and minerals must pass through the cytoplasm of endodermal cells in order to enter the _____.
endodermis
The _____ is a single layer of rectangular cells that forms a boundary between the cortex and the inner vascular cylinder.
casparian
The _____ strip prevents the passage of water and mineral ions between adjacent cell walls.
pericycle
The _____, the first layer of cells within the vascular cylinder, has retained its capacity to divide and can start the development of branch, or lateral, roots.
single, thin, hairs
The epidermis, which forms the outer layer of the root, consists of only a _____ layer of cells. The majority of epidermal cells are _____-walled and rectangular, but in the zone of maturation, many epidermal cells have root _____.
cortex
Moving inward, next to the epidermis, large, thin-walled parenchyma cells make up the _____ of the root.
pith
The ground tissue of a monocot root's _____, which is centrally located, is surrounded by a vascular ring composed of alternating xylem and phloem bundles.
monocot
_____ roots also have pericycle, endodermis cortex, and epidermis.
apical meristem
The shoot _____ _____ is protected within the terminal bud, where leaf primordial (immature leaves) envelop it.
primary xylem
The first xylem cells produced
primary phloem
The first phloem cells produced
primary
The shoot apical meristem produces _____ meristems.
epidermis, pith, cortex, vascular
Protoderm gives rise to _____; ground meristem gives rise to _____ and _____; and procambium gives rise to _____ tissue, including primary xylem, primary phloem, and vascular cambium.
herbaceous
Mature nonwoody stems, called _____ stems, exhibit only primary growth.
primary, secondary
_____ tissues are those new tissues formed each year from primary meristems right behind the shoot apical meristem, while _____ tissues develop during the first and subsequent years of growth from lateral meristems: vascular cambium and cork cambium.
periderm, phloem
the bark of a tree contains _____ (cork and cork cambium), and _____.
phloem
Although secondary _____ is produced each year by vascular cambium, _____ does not build up from season to season.
phloem
If the bark of a tree is removed, _____ cannot transport nutrients.
xylem
The buildup of secondary _____ in a woody stem results in annual rings, which tell the age of the stem.
mesophyll
The body of a leaf is composed of _____ tissue.
palisade, spongy
Most eudicot leaves have two distinct regions: _____ mesophyll, containing elongated cells, and _____ mesophyll, containing irregular cells bounded by air spaces.
mesophyll
Photosynthesis takes place in the _____ tissue of leaves.
phloem
Sugar exits leaf through the _____.
xylem
Water and minerals enter leaf through _____.
stomata
Gases such as O2, and water exit leaf through the _____.
stomata
CO2 enters leaf through the _____.
casparian strip
This important waterproof layer is found in roots and forces water to go through the endodermal cells (and not around them) before passing through to the vascular cylinder.
secondary
Wood is a _____ xylem which builds up each year; the vascular cambium is dormant during the winter.