1 00:00:05.820 --> 00:00:07.980 Hi, welcome to what a plant knows. 2 00:00:07.980 --> 00:00:11.320 If by chance you clicked on the wrong course, go back and 3 00:00:11.320 --> 00:00:14.240 get to the course you want because this is what a plant knows. 4 00:00:14.240 --> 00:00:16.420 And we're going to start this class a little 5 00:00:16.420 --> 00:00:19.300 differently than many other classes that you've probably taken. 6 00:00:19.300 --> 00:00:23.250 So, what I want you to do. Is put down your pencils. 7 00:00:24.760 --> 00:00:26.060 Sit comfortably in the chair. 8 00:00:26.060 --> 00:00:29.340 If you can, turn down the lights in your room. 9 00:00:29.340 --> 00:00:31.740 Okay? Now, sit down, 10 00:00:31.740 --> 00:00:32.770 take a deep breath in. 11 00:00:32.770 --> 00:00:35.040 [SOUND] 12 00:00:35.040 --> 00:00:35.985 Now, take a breath out. 13 00:00:35.985 --> 00:00:36.705 [SOUND] 14 00:00:36.705 --> 00:00:39.305 Another breath in. 15 00:00:39.305 --> 00:00:39.855 [SOUND] 16 00:00:39.855 --> 00:00:41.945 And another breath out 17 00:00:41.945 --> 00:00:42.730 [SOUND]. 18 00:00:44.190 --> 00:00:45.910 You can even close your eyes if you want. 19 00:00:45.910 --> 00:00:48.285 going to relax a bit more, another breath in 20 00:00:48.285 --> 00:00:50.021 [SOUND]. 21 00:00:50.021 --> 00:00:51.180 And another breath out 22 00:00:51.180 --> 00:00:52.630 [SOUND]. 23 00:00:52.630 --> 00:00:57.580 Now, as you're slowly breathing, imagine that there's been concrete 24 00:00:57.580 --> 00:01:01.250 poured in your room, and it's going all around your feet. 25 00:01:01.250 --> 00:01:02.626 Now take a breath in 26 00:01:02.626 --> 00:01:03.228 [SOUND], 27 00:01:03.228 --> 00:01:04.346 and a breath out 28 00:01:04.346 --> 00:01:04.960 [SOUND]. 29 00:01:06.180 --> 00:01:10.446 Now as this concrete is around your feet, it's slowly, slowly 30 00:01:10.446 --> 00:01:15.029 drying, and you're trying to move your feet, but they're stuck. 31 00:01:15.029 --> 00:01:16.870 You can't move them. 32 00:01:16.870 --> 00:01:17.875 Take another breath in 33 00:01:17.875 --> 00:01:19.960 [SOUND], 34 00:01:19.960 --> 00:01:20.975 and another breath out 35 00:01:20.975 --> 00:01:21.580 [SOUND]. 36 00:01:21.580 --> 00:01:25.820 You're trying to move your feet, but you're cemented in place. 37 00:01:27.550 --> 00:01:31.190 Now, as you're cemented in place in your room, start 38 00:01:31.190 --> 00:01:35.430 to think how is this going to affect your life? 39 00:01:35.430 --> 00:01:36.675 Another breath in 40 00:01:36.675 --> 00:01:37.090 [SOUND] 41 00:01:37.090 --> 00:01:38.667 and another breath out 42 00:01:38.667 --> 00:01:39.260 [SOUND]. 43 00:01:40.930 --> 00:01:44.400 So now, that you are all cemented where you are. 44 00:01:44.400 --> 00:01:50.990 I want you to take a second, and on the screen now, type in what type of problem 45 00:01:50.990 --> 00:01:52.960 you think you would have in your life, if 46 00:01:52.960 --> 00:01:55.950 you couldn't move, if you were always cemented in place. 47 00:02:02.180 --> 00:02:03.785 Keiko from Tokyo wrote in, well 48 00:02:03.785 --> 00:02:04.150 [LAUGH], 49 00:02:04.150 --> 00:02:05.250 that she couldn't go to the bathroom. 50 00:02:05.250 --> 00:02:06.700 You know, that would really be a problem or you 51 00:02:06.700 --> 00:02:09.250 could go to the bathroom, but you're stuck in place. 52 00:02:09.250 --> 00:02:11.340 How would that affect your life? 53 00:02:11.340 --> 00:02:13.790 So here we see Klaus from Germany wrote in that you know, he'd 54 00:02:13.790 --> 00:02:16.929 be hungry and thirsty and he couldn't get food or couldn't find water. 55 00:02:18.910 --> 00:02:21.850 Tom, from Pittsburgh came in, they said he be 56 00:02:21.850 --> 00:02:23.900 cold, hot, you know, he couldn't get a sweater. 57 00:02:23.900 --> 00:02:27.780 You know, how would we deal with changes in temperature if we couldn't move? 58 00:02:27.780 --> 00:02:29.170 And well, I won't even say who wrote 59 00:02:29.170 --> 00:02:32.340 this but someone else wrote in that there would be a problem with sex. 60 00:02:32.340 --> 00:02:34.040 Or let's say, look at it from a more biological 61 00:02:34.040 --> 00:02:37.150 point of view, how could we reproduce, if we couldn't move. 62 00:02:38.310 --> 00:02:42.710 Well if you haven't understood this, these are all problems that plants have, because 63 00:02:42.710 --> 00:02:45.700 actually, the biggest difference between plants and 64 00:02:45.700 --> 00:02:48.780 animals, are that plants are sessile organisms. 65 00:02:48.780 --> 00:02:50.050 They can't move. 66 00:02:50.050 --> 00:02:54.300 They're literally rooted in place, just like you would be if you were cemented. 67 00:02:54.300 --> 00:02:58.312 You know, if you think about it if if if you have a problem. 68 00:02:58.312 --> 00:02:59.662 Let's say, you're hot or you're cold. 69 00:02:59.662 --> 00:03:02.240 You can go to the closet, get a sweater. 70 00:03:02.240 --> 00:03:05.140 You could turn on, the air conditioner or you could catch a plane 71 00:03:05.140 --> 00:03:08.910 down to Florida in the middle of the winter to, to escape the cold. 72 00:03:08.910 --> 00:03:11.690 But plants, they can't do that, they can't escape. 73 00:03:11.690 --> 00:03:13.870 They are stuck where they are. 74 00:03:13.870 --> 00:03:15.990 And because of this, all of plant biology 75 00:03:15.990 --> 00:03:19.410 is quite complex to allow them to change their 76 00:03:19.410 --> 00:03:23.640 own development, their growth, in order to survive stuck in one place. 77 00:03:24.880 --> 00:03:27.690 So on a very basic biological level, 78 00:03:27.690 --> 00:03:31.160 plants are often more complex than animals are. 79 00:03:31.160 --> 00:03:33.910 And as we'll learn in this class, plants have to know 80 00:03:33.910 --> 00:03:36.590 and I'm going to use air quotes quite a lot here. 81 00:03:36.590 --> 00:03:39.330 Plants have to know what their surrounding are. 82 00:03:39.330 --> 00:03:41.490 They have to feel the weather. 83 00:03:41.490 --> 00:03:44.390 They have to be able to know where the light is. 84 00:03:44.390 --> 00:03:46.150 The have to be able to see where the light is. 85 00:03:46.150 --> 00:03:48.890 They have to be able to feel if something is touching them. 86 00:03:48.890 --> 00:03:49.480 How do they do that? 87 00:03:49.480 --> 00:03:51.610 That's what we're going to be learning in this course.