1. KEY CONCEPT Technology continually changes the way biologists work.

2. Objectives:
Students will be able to describe ways technology continually changes the way biologist work.
Students will be able to describe how biotechnology relates to the 21st Century.

3. Imaging technologies provide new views of life.
A microscope provides an enlarged image of an object.
light microscopes (LM)
stoma

4. Imaging technologies provide new views of life.
A microscope provides an enlarged image of an object.
light microscopes (LM)
scanning electron microscopes (SEM)
stoma

5. Imaging technologies provide new views of life.
A microscope provides an enlarged image of an object.
light microscopes (LM)
scanning electron microscopes (SEM)
transmission electron microscopes (TEM)
stoma

6. Imaging technology is used in medicine.
X-ray images

7. Imaging technology is used in medicine.
X-ray images
magnetic resonance imaging (MRI)

8. Imaging technology is used in medicine.
X-ray images
magnetic resonance imaging (MRI)
functional MRI (fMRI)

9. Complex systems are modeled on computers.
Computer models are used to study systems that cannot be studied directly.
heart attacks
Normal heartbeat
effect of medicines on the human body
movement of water molecules into and out of a cell
spread of a disease through a population
Heart attack
Computer models are used when experiments are not safe, ethical, or practical.

10. The tools of molecular genetics give rise to new biological studies.
A gene is a segment of DNA that stores genetic information.

11. Through our understanding of DNA, we can study genetics on a molecular level.
molecular genetics
genomics

12. 1.4 Review
1. How do light microscopes differ from electron microscopes?
Why is computer modeling used in biological studies?
How does molecular genetics add to our understanding of genes?
Viruses are smaller than cells. What types of microscopes could be used to study them? Explain
Provide an example of how technology has helped biologists gain a better understanding of life.

13. 5
KEY CONCEPT Understanding biology can help you make informed decisions.

14. 5
Your health and the health of the environment depend on your knowledge of biology.
Knowledge of biology helps you understand your health.
food allergies
potential effects of obesity

15. Knowledge of biology helps you understand your health. food allergies5
Knowledge of biology helps you understand your health.
food allergies
potential effects of obesity
cancer
effects of alcohol, tobacco, and other drugs
brain
lungs
heart
liver
kidneys

16. 5
Knowledge of biology can help you understand environmental issues.
interactions in ecosystems
pollution
biodiversity

17. Biotechnology offers great promise but also raises many issues.5
Biotechnology offers great promise but also raises many issues.
Biotechnology is the use and application of living things and biological processes.

18. 5
Biotechnology is the use and application of living things and biological processes.
DNA testing in medicine and forensics
transgenic (genetically modified) crops
transgenic bacteria

19. 5
Questions are raised about the use of biotechnology.
safety of genetically modified crops
spread of undesirable genes
decrease in biodiversity
ethical considerations

20. Biology presents many unanswered questions.5
Biology presents many unanswered questions.
Over the past 50 years, biological knowledge has greatly increased.

21. 5
There are still many questions to answer in biology.
How are memories stored in the brain?

22. There are still many questions to answer in biology.5
There are still many questions to answer in biology.
How are memories stored in the brain?
How do viruses mutate?
surface proteins
lipid
envelope
nucleic acid
capsid
Does life exist on planets other than Earth?

23. 1.5 Review
Give three examples of ways in which biology can help inform everyday decisions.
What are some of the potential benefits and potential risks of biotechnology?
What are some of the unanswered questions in biology?
Scientists disagree on whether genetically modified foods are safe to eat. What type of scientific evidence would be needed to show that genetically modified food is unsafe?
How might your study of biology help inform you about your lifestyle choices?