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Cairo University Semester :The Second

Faculty of Agriculture Academic Year : 2009/2010

Agricultural Botany Dept. Allowed Time : 2 hours

Agricultural Botany/ Physiology 101 ABT

English Program

Exam in Two Pages

Your answer must be supported by drawings as you can

Answer the following questions.

Question 1: (10 marks)

A- Define two of the following scientific terms:- (5 marks)

1- Plasmodesma(ta) 2- Abscission zone 3- Sap wood

B- Complete with the suitable answer: (5 marks)

1. Pits are constructed in the ___.

a) endoplasmic reticulum; b) secondary wall; c) cell vacuole; d) nuclear pore

2. The endodermis function is ____.

a) protein synthesis; b) water pathway; c) DNA replication.

3. The sclereids function is ____.

a) water conductivity; b) starch storage; c) photosynthesis; d) supporting

4. Which of these tissues considered as simple tissue ?

a) xylem; b) phloem ; c) periderm; d) epidermis; c) all of these.

5- Vessels are characterized by ____.

a) sieve plate; b) pointed end walls; c) perforation plate; d) bordered pits

Question 2: (20 marks)

A- Complete the following sentences: (10 marks)

1- The parenchyma cells that have a large intercellular space called

while parenchyma that have chloroplast called ..

2- Types of collenchyma cells are .., .. and ..

3- Lateral meristems are and .

4- Conductive elements in xylem tissue are .. and .

.

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5- Primary meristems are .. , . and

.

6- Vascular bundles types in stems are , ..and ..

..

7- The cells of cambium are often termed initials which are and .

..

8- Lateral roots almost are of endogenous origin as they arise from

B- Answer Two from the following questions: (10

marks)

1- Give complete comparisons between both tracheids and vessel elements in

xylem?

2- From the Table below, what are function of the following;

Organ The Function

Stomata

Palisade parenchyma

Spongy parenchyma

Xylem

Phloem

Lenticel

3- Define and complete the following diagrams?

1

2

Question 3: (15 marks)A- Complete the following sentences: (5 marks)

1- Asexual reproduction types are ... , .. and .2- The genus includes group of related .................................

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3-The common and constant stage of angiosperms is

4-In Ferns, the male organ is and the female on is

5-The complete flower is..

B- Join phrases of column (A) matching those of column (B) (5 marks(

1-Eukaryotes have 1- Male and Female cones2-Single fertilization occur in 2- Spiral chloroplastid

3-Ovary consists of 3- Fulse nucleus

4-Conifers have 4- Gymnosperm

5-Spyrogira have 5- Ovule, style and stigma

6- True nucleus

C- Write the key words suitable for each of the following sentences: (5 marks)

International Code of Botanical Nomenclature1

Dry plants collected and kept with all information2

The dominant form of Mosses that contain Antheridia and

Archegonia

3

Plants that have seeds but not fruits or flowers4

Type of sexual reproduction, have gametes which are similar

morphologically and differ physiologically

5

Question 4: (15 marks(Answer the following questions:

1- Mention the importance of water in the plants life (5 Mark)

2- Draw graphic of Carbon dioxide fixation process and citric acid cycle (5

mark)

3- Explain the major function of nitrogen and iron (5

mark)

Best wishes

Prof. Dr. Adel Khattab Prof. Dr. Usama El.Segai Prof. Dr. Hassan Rashad

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Cairo University Semester :The Second

Faculty of Agriculture Academic year : 2009/2010

Botany Department Allowed Time : 2 hours

Model Answer

Agricultural Botany/ Physiology 101 ABT

English Program

Drawing is requested- Exam in Two Pages

Your answer must be supported by drawings as you can

Answer the following questions

Question 1: (10 marks)

B- Define two of the following scientific terms:-

a- Plasmodesma(ta) b- Abscission zone c- Sap wood

A- Plasmodesma(ta): cytoplasmic channels lined with plasma membrane thatconnect the protoplasts of adjacent cells across the cell wall.

B- Abscission zone1. Special region of petiole where the petiole attaches to the stem2. Mostly parenchyma cells in this region

3. Lignified cells are either smaller or lack lignin or both

4. The elongated vascular cells tend to be shorter

a. Fibers are usually absent

b. Thus an area of weakness

C- Sap wood:o The new formed secondary xylem (1-2 years old) in tree trunk

Still functioning in water conductivity

Found mainly out side heart wood

Characterized by light colors as a result of lacking pigments Weak and fragile

Less valuable in wood industry

B- Complete with the suitable answer

5. Pits are constructed in the ___.

a) endoplasmic reticulum; b) secondary wall; c) cell vacuole; d) nuclear pore

6. The endodermis functions in ____.

a) protein synthesis; b) water pathway; c) DNA replication.7. The sclereids functions in ____.

http://www.puc.edu/Faculty/Gilbert_Muth/botglosl.htm#ligninhttp://www.puc.edu/Faculty/Gilbert_Muth/botglosl.htm#lignin

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a) water conductivity; b) starch storage; c) photosynthesis; d) supporting

8. Which of these tissues considered a simple?

a) xylem; b) phloem ; c) periderm; d) epidermis; c) all of these.

5- Vessels are characterized by ____.

a) sieve plate; b) pointed end walls; c) perforation plate; d) bordered pits

Question 2: (20 marks)

4- Complete the following sentences (10 marks)

a.The parenchyma cells that have a large intercellular space called

aernchyma while parenchyma that have chloroplast called

Chloroplastb. Types of collenchyma cells are Angular, lamellar and lacunate

c.Lateral meristems are the Periderm and Vascular cambium

d. Conductive elements in xylem tissue are Tracheids and Vessels

e.Primary meristems are Protoderm ,Ground meristemand Procambium

f.Vascular bundles types in stems are Collateral, bi-collateral and Centric

g. The cells of cambium are often termed initials which are Fusiform and

Ray initials

h. Lateral roots almost are of endogenous origin as they arise from The

pericycle

5- Answer two from the following questions (10

marks)

a.Give complete comparisons between both tracheids and vessel elements in xylem?

Key points Tracheids VesselsEvolution Gyminosperm Angiosperm

Shape Elongated with pointed ends Short with transverse walls

Pits Bordered pits Simple pits

End wall Pointed with no end walls With perforation plates

Water hydraulic efficiency Less efficent More efficient

Cell to cell water path Water path through pits Water path through perforation plates

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2- What is the function of the following;

Item The FunctionStomata Gas exchange

Palisade parenchyma Photothynsis

Spongy parenchyma Storage

Xylem Water conduction

Phloem Food assimilates conduction

Lenticel Air exhange

3- Define and complete the following diagrams?

2

Question 3: (15 marks)

A- Complete the following sentences: (5 marks)

1- Asexual reproduction types are ... , .. and .

2- The genus includes group of related .................................

3-The common and constant stage of angiosperms is

4-In Ferns, the male organ is and the female on is

5-The complete flower is..

B- Join phrases of column (A) matching those of column (B) (5 marks(

1-Eukaryotes have 1- Male and Female cones

2-Single fertilization occur in 2- Spiral chloroplastid

3-Ovary consists of 3- Fulse nucleus

4-Conifers have 4- Gymnosperm

5-Spyrogira have 5- Ovule, style and stigma

6- True nucleus

C- Write the key words suitable for each of the following statments: (5 marks)

International Code of Botanical Nomenclature1

Dry plants collected and kept with all information2

1

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The dominant form of Mosses that contain Antheridia and

Archegonia

3

Plants that have seeds but not fruits or flowers4

Type of sexual reproduction, have gametes which are similar

morphologically and differ physiologically

5

Q4:

1- All chemical reactions that occur in plant takes place in solutions composed mainly

of water Photosynthesis depends upon water. Soil nutrients are brought to the root in a

solution of water Nutrient solution transport is reliant upon water

2-

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3- The N functions in plant are: It is a part of all living cells and is necessary part

all proteins, enzymes and metabolic processes involved in the synthesis and

transfer of energy- it is a part of chlorophyll, the green pigment of the plant help

plants with rapid growth, increasing seed and fruit.

The iron functions are: helps in the building of protein, chlorophyll, different

enzymes activities which relate with reduction and oxidation