IB ยท Biology
Biology A1.1.1
Learn Biology A1.1.1 in this free IB Biology video lesson for A1.1.1 Water as the medium for life.
Learn Biology A1.1.1 in this free IB Biology video lesson for A1.1.1 Water as the medium for life.
Learn Biology A1.1.1 in this free IB Biology video lesson for A1.1.1 Water as the medium for life.
The video discusses the significance of water as a medium of life, highlighting its essential functions for living organisms.
Key points include:
00:00Hello everyone, this is Hannah
00:03from Revision Dojo and today
00:05we will be covering syllabus
00:06point A1 point 1 point
00:071. Water as a medium
00:09of life. So essentially what
00:12this syllabus point is, is
00:15it's going to be covering
00:16the basic function of water
00:18and why it is important
00:20for living organisms. Now water
00:23is believed to be a
00:25medium for life. Darwin coined
00:27it
00:28you refer to life as
00:29having started in a small
00:30pond. Now our belief has
00:33evolved into stating the oceans
00:34as a medium where life
00:35starts. The most important thing
00:38to remember is that water
00:40is a very good spot
00:42for metabolic and essentially all
00:44biochemical processes to take place.
00:47So when a certain volume
00:48of water is isolated by
00:49memory, we get to see
00:51its functions. So the main
00:53ones that we're going to
00:54mention today are four.
00:56The first one being the
00:58biochemical processes. Now these biochemical
01:04processes include glycolysis, cell respiration,
01:09or even oxbows. Now these
01:12are all going to be
01:13mentioned within the IB syllabus
01:15and you'll know all about
01:17them. The second function of
01:20water is its ability to
01:22obtain nutrients and this includes
01:24foods, nutrients like glucose, amino
01:27acids, and they all come
01:29from the surroundings. The third
01:35thing we will talk about
01:36is the water's ability to
01:40remove waste products. Now these
01:43waste products can be released
01:45from reactions of metabolism and
01:48the main waste product here
01:49is carbon dioxide.
01:52So we're going to write
01:53down waste product removal. Finally,
01:58we've got the most important
02:02function of water, and that
02:03is its ability to sustain
02:05life. Now how exactly does
02:07it sustain life? So this
02:09is essentially through the release
02:11of target and products and
02:13the creation of energy. So
02:16we create energy and as
02:19a result,
02:20it sustains life. So this
02:26creates a very good place
02:28for life functions and hence
02:30why water is the medium
02:32of life.