Download Biology – the study of life

Make a two lists
Living
Nonliving
You have 3 minutes to list everything you
see on the next slide as living or nonliving.
READ
READ
READ
READ
1. Look at your list.
2. Do you need to change anything from your living list to
your nonliving list or nonliving list to your living list.
3. Share with your group
Biology
The Study of Life
Recognizing life’s characteristics and the
methods used to study life provide a basis
for understanding the living world.
Principles of Biology
Living things do not exist in
isolation; they are all
functioning parts in the
delicate balance of nature.
All living things depend upon
other living and nonliving
things in a variety of ways
and for a variety of reasons.
Leaves of this insect-eating pitcher plant form a tube
lined with downward-pointing hairs that prevent
insects form escaping. Trapped insects fall into a pool
of water and digestive juices at the bottom of the tube.
• Frog eaten by a pitcher plant
https://youtu.be/6bexB8kAfXE
• Stomach of a pitcher plant
https://youtu.be/hlWU_LYvK6g
The Pitcher Plant
• Name some of the pitcher plant
characteristics that make it alive
The Diversity of Life
The study of biology
will reveal the great
diversity of species
on Earth and the
way each species
fits into the dynamic
pattern of life on our
planet.
Click HERE to explore a multitude of diverse organisms.
Characteristics of Life
Organisms in nature possess unique
features that allow biologists to identify
them as living rather than nonliving. They
are as follows:
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Organization
Homeostasis
Reproduction
Growth and Development
Response to a Stimulus
#1 Organization
• All living things are
organized into Cells
• Unicellular - one celled
organisms.
Ex. Paramecium,
amoeba, stentor
• Multicellular – more than
one cell.
Ex. Humans, sponges
Scanning electron micrograph of
Staphylococcus aureus bacteria.
• Cells are not found in
nonliving things.
The five slides that follow are
examples of unicellular organisms
Organisms may be Multicellular
Follow this link and click on
“Go” in the right column for a
real video clip that shows an
animation of a multicellular
sponge's filtration process
#2 Homeostasis
• Regulate external
and internal
conditions.
• Get energy from
food.
• Use Energy
Click HERE to see a
demonstration of hypothermia.
Ability to Reproduce
Reproduction - is the ability to produce a new organism of
the same type. It is not essential for the survival of an
individual organism, but it is essential for the
continuation of a species (a group of organisms that can
interbreed and produce fertile offspring in nature).
There are two classifications of reproduction: Asexual and Sexual
Asexual - One cell splits into two new cells.
Ex. Paramecium, sponges, strawberry runner,
spider plants and other simple organisms usually
undergo asexual reproduction.
Reproduction
Sexual Reproduction - two different cells join
to form one new individual. New
individual is different from either parent.
Fertilization - union of the egg and sperm.
Zygote - new cell formed as a result of
fertilization. Most complex organisms
reproduce in this way.
Growth and Development
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Two Basic Kinds of Growth:
Increasing the number of cells.
Increasing the size of the cells.
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Development: cycle of changes living
things go through as they grow.
Aging process - part of cycle.
Death - end of the cycle.
Respond to Environment
• Stimulus - a change in the environment
– Ex. light shines in eyes.
• Response - reaction to the change.
– Ex. pupils get smaller.
• Vital to any organism
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Escape predators
Find food
Move to light
Move away from toxins
Find a mate
Importance of Biology
• Recognizing life’s characteristics and the
methods used to study life provide a basis
for understanding the living world.
Composition Notebook
• We will go outside around the school
• You will list 20 living and 20 non-living
items found in nature.
• You can take pictures to include in your
composition notebook.
Introduction to Biology
The Seven Characteristics of Living Things
1.
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6.
7.
20 living things found MHS Campus.
20 nonliving things found on MHS campus
Pictures are worth bonus points.