BIO-2 (plant tissue) Flashcards

1
Q

also know as “the team of workers”

A

Tissues

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2
Q

is a cellular organizational level between cells
and a complete organ.

A

tissue

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3
Q

an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function.

A

tissue

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4
Q

French for tissue

A

tissu

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5
Q

tissu means

A

something that is woven

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6
Q

the verb ______, means “to weave”

A

tisser

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7
Q

study of human and animal tissues is known
as

A

Histology

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8
Q

The study of human and animal tissues in connection with disease

A

histopathology

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9
Q

Levels of organization (7)

A

Atoms > Molecules > cells > tissues > organs > organs system > organism

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10
Q

2 types of plant tissue

A

Meristematic tissue
Permanent tissue

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11
Q

tissue is defined as a mass of young, immature and undifferentiated cells, which remain young forever and divide throughout the life of the plant.

A

Meristematic tissue

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12
Q

Greek for meristematic?

A

meristos

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13
Q

Meristos means?

A

divisible

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14
Q

Classification of Meristems

A
  1. Based on position in the plant body
  2. Based on the origin of formation
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15
Q

Classification of Meristems :
(a) Based on position in the plant body

A

Apical meristems
Intercalary meristems
Lateral Meristems

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16
Q

occur in shoot and root tips

A

Apical meristems

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17
Q

2 types of apical meristem tissue

A

Shoot and root apical meristem

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18
Q

-Occur in mature regions of shoot and roots
-Called secondary meristems

A

Lateral meristems

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19
Q

-Occur between mature tissues
-Regenerate the parts removed by grazing animals in grasses.

A

Intercalary meristems

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20
Q

Classification of Meristems :
(b) Based on the origin of formation

A

Promeristems
Primary meristems
Secondary meristems

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21
Q

-Meristematic tissue that has existed in the plant since the embryonic level.
-Location : Extreme tip of stem and root.
-Function : Forms primary meristem later the primary structure of the plant body.

A

Promeristems

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22
Q

-Meristematic tissue found in adult plant and still actively does cell division.
-Location : Seen just below promeristem.
-Function : Forms the primary structure of the plant body.

A

Primary meristems

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23
Q

-Meristematic tissue that originated from primary permanent tissues.
-Location : Laterally placed in stem and root.
-Function : Responsible for secondary growth of the plant.
-Example : Inter fascicular cambium and cork cambium of stem, cambium of root.

A

Secondary meristems

24
Q

Characteristics of meristematic cells

A
  1. Cells are small.
  2. Cells are usually cubical.
  3. Cell wall is thin.
  4. Nuclei are large.
  5. Vacuoles almost absent.
    6.Cells tightly packed with almost no intercellular spaces.
25
-These tissues arise from the meristematic tissue. -The cells of this tissue gradually loose their power to divide and acquire a definite shape, size and function. -These tissues may be living or dead.
Permanent Tissue
26
2 types of permanent tissues
Simple permanent tissue Complex permanent tissue
27
-This tissue comprises of same type of cells which perform the same function and all arise from the same origin. -Made of only one type of cell
Simple Permanent Tissue
28
3 categories of simple permanent tissues
Parenchyma Collenchyma Sclerenchyma
29
-the fundamental tissue composed of thin walled, living cells whose cell wall is composed of cellulose. Small intercellular spaces are present between the cells -Location: occurs in all soft parts of plants
Parenchyma
30
Types of Parenchyma (2)
Chlorenchyma Aerenchyma
31
Certain parenchymatous tissue contain chloroplast and synthesize food by the process of photosynthesis.
Chlorenchyma
32
In aquatic plants parenchymatous cells have air cavities between them to store air
Aerenchyma
33
-This tissue is composed of somewhat elongated cells with cell walls that are irregularly thickened at corners due to deposition of cellulose or pectin. -Location: It occurs below the epidermis of stem and petiole -Function: This tissue provides mechanical support and flexibility and in some cases it may possess chloroplasts to perform Photosynthesis.
Collenchyma
34
-It is a tissue of dead and thick walled cells, having no intercellular spaces. -Location: This tissue is usually found in the hard and stiff parts of the plant like seed coat, husk of coconut -Function: the chief mechanical tissue in plants and is able to bear push, pull, strain and shearing forces
Sclerenchyma
35
2 Types of sclerenchyma
Sclereids Fibres
36
Types of Sclereids (5)
Brachysclereids Macrosclereids Osteosclereids Asterosclereids Trichosclereids
37
2 Types of Fibres
Xylary fibres Extra xylary fibres
38
Types of Xylary fibres (3)
Fibre tracheids Libriform fibres Gelatinous fibres
39
Types of extra xylary fibres
Phloem fibres Cortical fibres Perivascular fibres
40
-A tissue made up of more than one type of cells functioning as a unit -Made up of more than one type of cells
Complex permanent tissue
41
2 types of complex permanent tissues
Xylem and Phloem
42
-It is a complex permanent tissue, which is specialized for the conduction of water and mineral substances in the plant body. -a heterogenous tissue made up of four different types of cellular elements.
xylem
43
4 types of cellular elements of xylem /components of xylem
Tracheids Vessels Fibres Parenchyma
44
-are elongated, dead cells, with tapering ends -characterized by the presence of a thick cell wall consisting of primary wall and a secondary wall.
Xylem Tracheids
45
-They are commonly known as xylem vessels. -are found arranged parallel to each other, extending from one end of the plant body to another.
Xylem Tracheae
46
-They are represented by the dead sclerenchyma fibers that are found in between the vessels and the tracheids -meant for providing mechanical support to the essential elements.
Xylem Fibres
47
-This is the only living component in the xylem tissue. -It is represented by groups of parenchyma cells that are found in between the vessels and the fibers. -They are meant for storage of reserve food
Xylem Parenchyma
48
The rings seen in the trunk of an old tree which has been cut transversely are the ____ ____. The age of a tree can be determined by counting the number of rings.
xylem rings.
49
-is a complex permanent tissue, which is specialized for the conduction of food and other organic substances. -is commonly described as a living, complex permanent tissue.
Phloem
50
4 types of cellular elements of phloem/ Components of phloem
Sieve elements Companion cells Fibres Parenchyma
51
-They represent the most active food conducting elements in the phloem tissue. -found arranged parallel to one another from one end of the plant body to another.
Sieve Tubes
52
-They are more or less spindle shaped cells associated with the sieve tube cells. -found attached to any one lateral surface of a sieve cell. -represent a pair of sister cells.
Companion Cells
53
-are represented by the dead sclerenchyma fibres that are found in between the sieve tubes. -They are meant only for providing mechanical support.
Phloem Fibres
54
-is represented by a group of living parenchyma cells that are found in-between the sieve tubes. -They are meant only for storage of organic food.
Phloem Parenchyma
55
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