Lucrari Practice Celula Lb.engl.

8/20/2019 Lucrari Practice Celula Lb.engl.

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COLEGIUL NAŢIONAL “ECATERINA TEODOROIU” TG-JIUPROFESOR: NEGULEASA CARMEN

WORK PAPER 1

THEME: “THE CELL – STRUCTURAL AND FUNCTIONAL UNIT OF LIFE”LESSON: TIPS OF CELLS

Schoo: G!o"#:N$%&: D$'&:C$((!oo% I)

Th& &*+,&'+o o. #!o/$!0o'& c& $' $c'&!+$(

1.Achieve a microscopically preparation for observe the bacteria.You act in this way:

-stretch on a slide of glass, in a very thin layer a drop of yogurt.

-thus, you have achieved a smear.-then overpass the slide with the smear on top, over a flame

until it gets hot ,except that not to broil too hard when you stick it on the backhand.

-pour water over the smear, then a few drops on a starch of

fuxina or blue of ethylene.-leak the dye substance after two minutes.

-wash the smear with a low current of water and let the slide dry.-arrange the slide at microscope and observe the smear.

-draw what you observe.

-analye at microscope the permanent microscopically preparations from the table.

-compare what you saw with the images below.

-note some characteristics of the observed cells.


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WORK PAPER 2THEME: “THE CELL – STRUCTURAL AND FUNCTIONAL UNIT OF LIFE”

LESSON: TIPS OF CELLS

Schoo: G!o"#:N$%&: D$'&:

Th& &*+,&'+o o. &"/$!0o'& c& $' #!o'+('&(

- put on the lama a drop of water from a vessel with hay infusion.

- set some fibers of wadding over the drop of water, which will help you limit the

movement of creatures so that you could observe more easily.- identify the protist organisms !unicellular with individual nucleus" in the

microscopic preparation.

- draw and identify the protist and note their shape.


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LESSON: TIPS OF CELLS

Schoo: G!o"#:N$%&: D$'&:C$((!oo% I)

Th& &*+,&'+o o. &"/$!0o'& c& $' #$'(

1.#ake a microscopic preparation of the inferior onion epidermis:

-remove a section of inferior epidermis-place the section into a drop of water on a mount

-place over the drop of water that contains the fragment a mount and press easily -draw and note what you observe

$he inferior onion epidermis %ell from the inferior onion

epidermis

&.#ake in the same way a microscopic preparation from leafs of water plague:

-observe the preparation at the microscope

-search the green little particles !chloroplast" -observe their movement

-draw what you see and then show through the arrows the movement direction of the

cytoplasm currents that you observe.

'arenchyma cells from the leaf of %ell from the parenchyma

water pest assimilator of the leaf


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WORK PAPER 4

THEME: “THE CELL – STRUCTURAL AND FUNCTIONAL UNIT OF LIFE”LESSON: TIPS OF CELLS

Schoo: G!o"#:N$%&: D$'&:C$((!oo% I)

Th& &*+,&'+o o. &"/$!0o'& c& $' $+%$(

15C!$c/ $ .!&(h &66 o $ #$'&5

- observe the cruel egg, witch is a (giant) cell, if it is impregnate- note the component parts of this cell*

25C!&$'& $ %+c!o(co#+c #!$!&,7 'h$' 8+ %$/& 0o" 'o o(&!*& 'h& !&, c&( .!o%oo,5 +ike so:

- bent a drop of blood in a slime layer*

- wait for it to dry* and then observe it at the microscope *

- draw what u see

- note on the draw the components of the cell that you ust observe .


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Schoo: G!o"#:N$%&: D$'&:C$((!oo% I)

D+('+6"+(h 'h& *o$'+& o+( .!o% c&(

ork method:

- 'eel a orange and execute from his skin fine sections

- 'ut the section in a drop of water with glycerin on a microscope llama- %over it with a llama and observe the mixture at the microscope with 1

times oom

- /bserver in the deep layers, from big and empty depths , some drops of oil- 0nterpret the existence of the drops of fat


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WORK PAPER THEME: “THE CELL – STRUCTURAL AND FUNCTIONAL UNIT OF LIFE”

LESSON: CELLS DI;ISION

Schoo: G!o"#:N$%&: D$'&:C$((!oo% I)

%ells division process through which from a mother-cell there are created &daughters cells*

can be:

a" ,+!&c': it is achieved in absence of the division neck* b" +,+!&c': it is achieved by means of the division neck*

is of two types: %+'o(+( $, %&+o(+(5$he %+'o(+( is the process through which from a mother-cell there are created &daughters-cells, having the same number of chromosomes. 0t takes places in the body2scells. 0t is achieved in four phases: prophase, metaphase, anaphase, and telophase.

$he %&+o(+( is the process through which from a mother-cell there are created 3daughters-cells having a number of chromosomes reduced by half. 0t takes place in thecells of the reproductive organs. 0t is achieved in two stages:

a. meiosis 0 with four phases: prophase 0, metaphase 0, anaphase 0, telophase 0.

b. meiosis 00 with four phases: prophase 00, metaphase 00, anaphase 00, telophase 00.

Co%#$!+(o &'8&& 'h& #h$(&( o. 'h& %+'o(+( $, 'h& #h$(&( o. 'h& %&+o(+( 0

MITOSIS MEIOSISP!o#h$(&

- the nuclear membrane and the nucleolusdisorganise*

- the bichromatidic chromosomes

individualise*- the division neck starts shaping*

P!o#h$(& 1

- the same features as in the mitosis 4*- the homologues chromosomes form pairs

called bivalents or chromatidic tetrads*

- between the homologue chromosomes genesmutual exchange !crossing-over" takes place

M&'$#h$(&- the bichromatidic chromosomes are

condensed to the maximum !they are easily

noticeable to the microscope"- the chromosomes are attached to the

division neck fibres by means of the

centromer*- the chromosomes are placed in the middle

of the cell, in metaphasic plate*

- in the end, each bichromatidicchromosome splits by two

M&'$#h$(& 1- the bivalents are placed in the middles of the

cell, in metaphasic plate*

- in the end, the chromosomes of each bivalentseparate.


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monochromatidic chromosomes.

A$#h$(&- the monochromatidic chromosomes

migrate passively towards the cell poles

A$#h$(& 1- the bichromatidic chromosomes, in number

reduced by half migrate passively towards thecell poles

T&o#h$(&- the division neck disorganises*

- the monochromatidic chromosomes lose

their individuality*- the nucleolus and the nuclear membrane

reorganise*

- the separating wall between the

daughters-cells is shaped.

T&o#h$(& 1- the division neck disorganises*

- the bichromatidic chromosomes in number

reduced by half lose their individuality*- the nucleolus and the nuclear membrane

reorganise*

- the separating wall is shaped.

5ill in the blanks:0n the mitosis prophase the chromosomes are made up of: ----------------------

0n the metaphase 0 the chromosomes are made up of: ---------------------$he crossing-over takes place in: ---------------------------------0n prophase 0 the homologue chromosomes arrange in pairs called ------------------------or

------------------

Associate the notions in column A with those in column 6, to each letter writing its

corresponding figure.

A 6

--- a. metaphase 1. the bichromatidic chromosomes lose their individuality--- b. metaphase 0 &. the bichromatidic chromosomes become monochromatidic

--- c. telophase7. the homologue of each bivalent separates

--- d. telophase 00 3. the monochromatidic chromosomes lose their individuality


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/89 'A'8 ;

$? @>A)

+/>: $B%+0% A%0@

Schoo: G!o"#:N$%&: D$'&:C$((!oo% I)

A+%: 6y carrying out this students practice their skills and the ability to extract @>A,they understand that it is present in all cells.

A(8&! 'h& .oo8+6 !&otice the top layer. rite down what you notice*-nter after &-7 minutes a toothpick and remove @>A from the top layer.

A(8&! 'h&


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Lucrari Practice Celula Lb.engl.

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