designed by pyeongsug kim ©2009 [email protected]@att.net si session lab. practice for final part...

Designed by Pyeongsug Kim ©2009 [email protected]

SI session

Lab. Practice for Final

Part I

Spring 2009

Dr. Hughey’s Bio 3 (Lab.)

mailto:[email protected]

http://sibiology.science-i.com/



Designed by Pyeongsug Kim, ©2009

A)B)

What type of root system are you seen? Monocot? Eudicot?A) B)

Tap root (Eudicot) Fibrous root (Monocot)


What type of root system is Dr. Hughey pointing and give rise from stem?

Adventitious root


A

B

C

D

E

F

G

HI

What are the three regions in root?

Region of maturation,Region of Elongation,Apical meristem(Region of Cell Division)

Label. (A thru I)

A-B-C-D-E-F-G-H-I-

Region of maturationRegion of ElongationApical meristem(Region of Cell Division)

Protoderm Ground meristem Procambium Apical meristem Promeristem Rootcap

Name of tubular extension? Root hair What is the function? facilitate absorption.Name of the region where the tubular extension is present? Region of maturation



Name of the thimblelike mass of parenchyma? Region? Function?

Rootcap; Region of cell division(Apical meristem); Covers the root and secretes mucigel

What is the name of structure penetrating the cortex? What is the name of part where the structure originates?

Lateral root; Pericycle


Monocot? Eudicot? How do you know?

Monocot; Vascular cylinder in ring with pith.

Lateral root; Pericycle

What is the name of structure which the arrow indicates? What is the name of part where the structure originates?


Eudicot; Vascular cylinder solid.



A

BCD

E

#10

Monocot root? Eudicot root? Eudicot root

LabelA-B-C-D-E-

PericyclePrimary Phloem Endodermis MetaxylemProtoxylem (first-formed primary xylem)


A B C D E

F

Monocot root? Eudicot root? Can you see secondary growth?

Monocot root; No Only primary growth

LabelA-B-C-D-E-F-

EndodermisProtoxylem (first-formed primary xylem) Primary PhloemPericycle Early metaxylem Late metaxylem


AB

F

G

C

D

E

LabelA-B-C-D-E-F-G-

ProtodermLeaf promordium Leaf promordium Ground meristem Bud primordium Apical meristem Node


A B

Can you see secondary growth? No Only primary growth

Vascular bundle Pith (ground tissue)

Label.A-B-

Monocot? Eudicot? How do you know? Eudicot ; the vascular tissues forms of discrete strands


A B

Label.A-B-


Vascular bundlePith (ground tissue)

Can you see secondary growth?

Dicot ; the vascular bundles appear scattered throught the ground tissue.

No Only primary growth

E

F

AB

CD

GH I J


Label.A: B: C: D: E:F: G:H:I:

What type of plants has the structures you are seeing? How do you know?

Hydrophyte ; Large intercellular spaces for buoyancy

Upper EpidermisVein(vascular tissue)StomaPalisade parenchymaSpongy parenchymaTrichome Intercellular space(buoyant)Lower epidermisBundle sheath

A BC

F G H J

E

I


Label. A:B:C:D:E:F: G: H: I:J:

What type of plants has the structures you are seeing? How do you know? Xerophyte ; Thick waxy cuticle, stomatal crypts

CuticleVein(vascular tissue)Upper epidermisPalisade parenchymaSpongy parenchymaLower epidermisTrichome Guard cellStomatal cryptsBundle sheath


C

D

A B

HGFE

I

Label. A: B:C:D:E:F: G: H:I:

What type of plants has the structures you are seeing?

Mesophyll

XylemUpper epidermisPalisade parenchymaSpongy parenchymaLower epidermisStomaPhloemTrichome Bundle sheath


There are two layers in the zone. What are they? Function in each?

You are look at a zone of a leaf. What is the name of zone of the leaf? Abscission (the normal separation of the leaf from the stem.)

Separation layer – the break occurProtective -forms a leaf scar


A) B)

Monocot? Eudicot? How do you know? A-B-

Eudicot- random stomataMonocot-parallel stomata


Name of term of this phenomenon by the internal stimulus?

Auxin(hormone)

Which one is the stronger internal stimulus?

What internal stimulus in a plant can cause different height and lateral length as shown in the two pictures?

Bottom tree

Auxin inhibits axillary(lateral) budsHow the internal stimulus works?

Apical dominance


A BC

If you cut the blade and then put IAA(Auxin) in lanolin on it in the plant A, only lanolin on it in the plant B, and put nothing on it in the plat C. What happens in each: Plant A, B, & CPlant A; Abscission does not occurs.Plant B; Abscission occurs.Plant C; Abscission occurs.

What is effect of IAA(Auxin)? Prevent abscission.

What is effect of lanolin? No effect


You are looking at same species. What external stimuli cause different height? What is the name of ?

mechanical stimuli.

Thigmomorphogenesis


AB

You are doing experiment of hormone auxin. You prepare two pots and plant dicot and eudicot in each pot. You forget to put a label in each. After 3 weeks, you saw the result of the experiment. Which pot has been treated with 2,4 D(synthetic Auxin)? How do you know?

A: Because auxin acts as an herbicide(killing dicot)


What Hormone can cause different height in a same species? Effect of the hormone?

Gibberellin causes hyperelongation of shoots by stimulating cell division and elongation.


What is the name of phenomenon in root?

What is the name of phenomenon you are seeing in shoot?

Negative Gravitropism

What external stimulus cause the shoot grow upward? Gravity

Is the growth in the root same as the shoot? No; the roots grow downward.

Positive Gravitropism


A B

C

In the picture C, which part is involved by the movement (solar-tracking) of sunflower? Explain how the part works to move the flower.

What type of tropism is in each picture A, B, C? Write the external stimulus in each. A- B- C-

Phototropism; sunlight Thigmotropism; solid objectHeliotropism; Sunlight

Pulvini; Turgor pressure changes of the Pulvini.


What is the name of phenomenon you are seeing?

What is the external stimuli?

Which part is involved by the movement?

Thigmonasty

Touch

Pulvini; Turgor pressure changes of the Pulvini.


What are the name of square equipment and thread(or like ruler)?

What are they for?

Square - Quadrats Thread- Transects

For study or measurement of the distribution or abundance of plants or other organisms in an area.

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