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Intro to Biology 1st year notes

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Course
Biology

Institution

Biology 1st year beginner notes A quick sneak peek into the world of biology and understanding what it includes. These notes will form the base to dive deep into the science of living things and understand more complex topics. The notes look into defining biology, understanding unicellular and ...

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Uploaded on February 28, 2023
Number of pages 3
Written in 2022/2023
Type Interview
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beginnerbiology
introtobiology
firstyear

Institution Secondary school
Biology
School year 1

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Biology Lecture 1 Intro to Biology
Biology is essentially the study of life. Life deals with essentially, how all living things are and
what is common amongst all living things. And so when we study life, it 's one of those
things that doesn't quite have an easy definition. We all intuitively know what is alive and
what is not. So far, most scientists can agree upon a particular definition of life. Despite the
fact that there are millions of species of organisms on our planet, they all share one
common feature characteristic and that is that all living things are made of cells.. bacteria,
yeast, a group of organisms called protists or subgroups within that kingdom - all living
things are made of cells. All cells come from preexisting cells.. the most basic level of
organisation of life is the cell. There are five characteristics that every living organism
exhibits.

The first characteristic is that all life is organised and that 's where we are going to spend our
initial time, looking at this complexity from the atoms and up. Later on, you can study
biology at more complex levels of organisation. Though there are over 100 elements, 92 are
actually naturally occurring and others which we have created in the laboratory using those
92 naturally occurring elements. There are only six that you will find in every living organism.
These six elements or what we call atoms will be found in all living organisms. You will find
all six of these elements in living organisms in a wide variety of different shapes. Organelles
are small structures that have a specific role or function in the cell. Each organ has
essentially their own function. One of the more important organelles, especially for our body
are things like mitochondria. Another organelle is what we call ribosome. A ribosome is this
large structure that essentially makes proteins so your body functions depend upon which
proteins are made.

A cell is made up of tens of organelles. Organelles are structures in a cell each with their
respective functions. Some of them digest food and make energy like the mitochondria.
Others protect your DNA , like the nucleus. There is some fundamental structure that is
universal for all cells but there are fundamental differences as well based upon which
organelles they have. In the human body alone , we have four main types of tissues. We have
over 256 different types of cells and the different combinations of those cells is what forms
the different tissues. Some cells when they come together will form muscle. Other cells form

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