HistoryTraditions Gifts Dates Valentines 1 5 4 3 2 4 3 2 1 4 2 5 3 1 2 5 1 3 4 1 2 3 4 5.
Instead of Study Guide, answer section reviews: 1.1 # 1-2 1.2 # 1-4 1.3 # 1-4 1.4 # 4-5 1.5 #...
-
Upload
trevor-isaac-fields -
Category
Documents
-
view
212 -
download
0
Transcript of Instead of Study Guide, answer section reviews: 1.1 # 1-2 1.2 # 1-4 1.3 # 1-4 1.4 # 4-5 1.5 #...
Instead of Study Guide, answer section reviews:
1.1 # 1-2 1.2 # 1-4 1.3 # 1-4 1.4 # 4-5 1.5 # 1-2, 6
15 Problems Total – Due by Friday 9/2
Biology in the 21st Century
Life is found everywhere….Think of the most obscure place you think life might beYellowstone PoolsBottom of the Ocean Ice in Antarctica
All living things and the places they are found on Earth is the biosphere
Biodiversity is the variety of life in an area Increases from poles to the equatorWhy would it be greater closer to the
equator? 2 million species that we know of…but…
10,000 more discovered every year50,000 go extinct every year
1. All organisms are made up of one or more cells
2. All organisms need a source of energy for their life processes
3. All organisms react to their environment- Why is this important?
4. All organisms have the ability to reproduce- Why is this important?
All levels of biology have systems (organized group of related parts that interact to form a whole) What are some examples?
Circulatory System Two Organisms that Interact in Ecosystem
Describe how your Biology class may be considered a system.
The structure and function of things are related Molars vs. incisors Red blood cells vs. brain cells
Organisms must maintain homeostasisMaintained in 2 ways
Negative feedbacka change in a system causes a response that
brings things back to “normal” Behavior
Reptiles sitting in the sun Eating to get your blood sugar back up
Evolution – the change in living things over timeHelps explain diversity
All scientific inquiry starts with observation which can be gathered as Qualitative data
Objective Descriptions such as Sights, sounds, smells
Quantitative data Numeric measurements such as mass, volume,
numbers, temperature, frequencyFrom the picture on the next slide, come up
with 3 quantitative and 3 qualitative pieces of information
Qualitative Examples:-Range in color from gray to white-Pod engaging in play behavior
Quantitative Examples:-Eight Dolphins- Each of the eight Dolphin has one dorsal fin
Before we move on to Section 4 and 5, please write a summary your notes thus far... Make sure you address the following concepts:
1. Independent and Dependent Variables2. Control group3. Steps in the Scientific Method4. Qualitative vs Quantitative observations5. Homeostasis6. Characteristics of living organisms
You will get 5 minutes to write, so get started now!
Be prepared to read your summary!
A microscope provides an enlarged image of an object.– light microscopes (LM)
stoma
stoma
A microscope provides an enlarged image of an object. scanning electron microscopes (SEM)Shows 3-dimensional views
stoma
• A microscope provides an enlarged image of an object.– transmission electron microscopes (TEM)– Shows a 2–dimensional image
Imaging technology is used in medicine.X-ray imagesShows dense
tissues, such as bones
• Imaging technology is used in medicine.– magnetic resonance imaging (MRI)
– Shows soft and dense tissues
functional MRI (fMRI)Shows areas of the brain are active while a
person does a particular task
Computer models are used to study systems that cannot be studied directly.heart attackseffect of medicines on the
human body– movement of water molecules
into and out of a cell– spread of a disease through a
population• Computer models are used
when experiments are not safe, ethical, or practical.
Normal heartbeat
Heart attack
®1.5 Knowledge of biology helps you understand your health.
food allergies potential effects of obesityeffects of alcohol, tobacco, and other drugscancer
brain
lungs
heart
liver
kidneys
Why use sunscreen?Why exercise?Effects of smoking, alcohol, drugs
Knowledge of biology can help you understand environmental issues.® interactions in ecosystems® Pollution® biodiversity
What kinds of environmental pressures may have caused the deformities in this frog? Could the same pressures affect humans?
DNA testing in medicine and forensics
• Biotechnology is the use and application of living things and biological processes.
– transgenic (genetically modified) crops– transgenic bacteria
Questions are raised about the use of biotechnology.
– spread of undesirable genes– decrease in biodiversity– ethical considerations
– safety of genetically modified crops
Over the past 50 years, biological knowledge has greatly increased.
Methane Worms
There are still many questions to answer in biology.
– How are memories stored in the brain?
There are still many questions to answer in biology.
surface proteins
lipid
envelope
nucleic acid capsid
– Does life exist on planets other than Earth?
– How do viruses mutate?