WEBVTT

00:00.920 --> 00:15.520
Pores, a flawless creation.

00:15.520 --> 00:20.400
The microscopic holes on the leaf surface are responsible for heat and water transfer and

00:20.400 --> 00:26.480
for obtaining the carbon dioxide required for photosynthesis from the atmosphere.

00:26.480 --> 00:33.600
These holes, known as pores, have a structure capable of opening and closing as necessary.

00:33.600 --> 00:38.160
When the pores are opened, the oxygen and water vapor between the leaf cells are exchanged

00:38.160 --> 00:42.660
for the carbon dioxide needed for photosynthesis.

00:42.660 --> 00:47.040
Production leftovers are thus expelled and substances that are needed are taken inside

00:47.040 --> 00:50.740
to be used.

00:50.740 --> 00:54.760
One of the interesting things about the pores is that they are generally found on the underside

00:54.760 --> 00:56.120
of leaves.

00:56.120 --> 01:02.020
This means that the negative effect of sunlight is reduced to the lowest level.

01:02.020 --> 01:06.900
If the pores, which expel water from the plant, were on the upper sides of leaves, then they

01:06.900 --> 01:13.400
would be exposed to sunlight for long periods of time.

01:13.400 --> 01:17.980
In that event, if the plant didn't die from the heat, the pores in its bodies would constantly

01:17.980 --> 01:24.900
give off water, meaning that the plant would die from excessive water loss instead.

01:24.900 --> 01:30.800
This special structure in the pores prevents the plant from being harmed by water loss.

01:30.800 --> 01:35.680
There is also a very fine detail in the structure of these pores, which have been specially arranged

01:35.680 --> 01:40.880
in the light of all the relevant factors in the external environment.

01:40.880 --> 01:46.780
We know that the external environment is constantly changing – humidity levels, temperature, gas

01:46.780 --> 01:48.780
levels, air pollution, etc.

01:48.780 --> 01:58.680
The structure of the pores in the leaves is such as to be able to adapt to all these variables.

01:58.680 --> 02:01.680
This can be illustrated by means of an example.

02:01.680 --> 02:06.580
In plants such as sugarcane and maize, which are exposed to high temperatures in dry air for

02:06.580 --> 02:12.800
long periods of time, the pores remain entirely or partly closed throughout the whole day in

02:12.800 --> 02:14.580
order to conserve water.

02:14.580 --> 02:22.900
But, these plants also have to absorb the carbon dioxide needed for photosynthesis in the daytime.

02:22.900 --> 02:28.860
Under normal circumstances, the pores should be wide open in order to permit this.

02:28.860 --> 02:33.980
However, this is impossible, because in that case, the plant would constantly lose water due

02:33.980 --> 02:37.720
to the fact that its pores were open and it would soon die.

02:37.720 --> 02:42.540
This means that the pores have to remain closed.

02:42.540 --> 02:46.460
But this difficulty has been overcome.

02:46.460 --> 02:51.540
Plants such as sugarcane and maize, that live in hot regions, use chemical pumps in order

02:51.540 --> 02:57.380
to be able to absorb carbon dioxide into their leaves, even if their pores are closed.

02:57.380 --> 03:02.200
If these chemical pumps were unable to function for a while, the plant would be unable to manufacture

03:02.200 --> 03:07.160
nutrients, since photosynthesis could not be performed, and it would therefore die.

03:07.160 --> 03:12.880
This shows the impossibility of these complex pumps in the leaves gradually coming into

03:12.880 --> 03:16.660
being by chance.

03:16.660 --> 03:21.540
Like all the others, this system in plants can only function when all of its components

03:21.540 --> 03:24.980
are fully present.

03:24.980 --> 03:32.220
Therefore, it is impossible for the pores in plants to have evolved by chance.

03:32.220 --> 03:38.100
These pores, with their very special structure, have been created by God in such a way as to

03:38.100 --> 03:39.220
fulfill the most delicate task.

03:39.220 --> 03:40.400
Time for the hours later and will be perceived immediately there.

03:40.400 --> 03:43.220
Familie

03:43.220 --> 03:45.140
Thai

03:45.140 --> 03:49.040
J

03:49.040 --> 03:49.440
Aj

03:49.440 --> 03:50.220
J

03:50.280 --> 03:50.940
Aj

03:50.940 --> 03:53.180
Aj

03:53.180 --> 03:53.700
Aj

03:53.700 --> 03:54.140
Aj

03:54.380 --> 03:54.560
Ugh

03:54.560 --> 03:56.140
Aj

03:56.140 --> 03:56.240
Aj

03:56.380 --> 03:57.140
Aj

03:57.140 --> 03:58.340
Aj

03:58.460 --> 03:59.320
Aj

03:59.320 --> 04:01.340
Aj

04:01.340 --> 04:02.420
Aj

04:03.140 --> 04:04.260
Aj

04:04.260 --> 04:05.180
Aj

04:05.180 --> 04:05.480
Aj

04:05.480 --> 04:06.240
Aj

04:06.360 --> 04:06.960
Aj

04:07.040 --> 04:09.100
Aj