1) Apakah proses yang terlibat dalam pengangkutan air dalam tumbuhan?

Soalan Aras 1, boleh dijawab sambil main Sim dalam FB. Terdapat 5 proses semuanya:

a) Osmosis - air mengalir dari tanah ke dalam sel akar

b) Tekanan akar - air mengalir dari sel akar ke dalam xilem

c) Tindakan kapilari - air mengalir sepanjang xilem naik ke atas

d) Transpirasi - air mengalir dari xilem ke stoma dan keluar ke

atmosfera dlm bentuk wap air

e) Tarikan transpirasi - air disedut dari xilem hasil proses

transpirasi

Maka, kita dapat lihat yang air mengalir dari dalam tanah ke liang stoma macam manusia punya hujung kaki hingga hujung rambut. Ini akan membentuk satu 'sungai' yang dipanggil aliran transpirasi (transpiration stream). Air mengalir sepanjang sungai ini dan singgah 5 'stesen' (tanah-sel akar-xilem-stomata-atmosfera) utk buat 5 proses yg telah disebut tadi.

2) Describe the processes mentioned above.

The first process, osmosis ...

osmosis

The 'stations' ground -----------------------------> to 'stations' root cells

This occurs because the ground water (liquid or diluted). Then, like a slide, water flows into the root cells of water (condensed or CONCENTRATED).

The second process, root pressure ...

Root pressure

The 'stations' root cells ---------------------------> to 'stations' xylem

This happens because the cells around xylem secrete salt into the xylem. So thick xylem (CONCENTRATED), and also the sliding range, the water flows from the root cells & dip into the pores of xylem.

The third process, capillary action ...

Capillary Action (CR)

---- xxxxxxiiiiiiiiiiiiiiiiiiillllllllllllllllllllllllllleeeeeemmmm ------->

Another bright've bersuluh that TK is the flow of water through the xylem. Can not see well go check points.

TK consists of two forces:

Adhesive forces (cohesion force), the charm that exists between water molecules.

Cohesive forces (adhesion force), the charm that exists between water molecules and the walls of the xylem.

This analogy is used:

Imagine a group of water molecules as a group of climbers to ascend the mountain named Mt. Xylem. They have to do two things so that they can take:

They must cooperate with each other (Cooperation) = cohesion force!

They must stick firmly on the stone floor so do not fall = adhesion force!

Both of these forces exist because the xylem is an art and fine as blood vessels. If xylem width and large, the water difficult to ride!

Also, the TK is important as fighting for gravity created by the movement of water upward.

The process will be continued and fifth keeempat then ...

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