bio ch1 sec1 and 2

11

Click here to load reader

Upload: jmason1

Post on 13-Jan-2015

2.829 views

Category:

Technology


0 download

DESCRIPTION

Chapter 1 Lecture slides for Mr. Masons Biology I,Hon. class.

TRANSCRIPT

Page 1: Bio Ch1 Sec1 and 2

section 1 The World of Biology section 2 Themes in Biology

Biology : The Science of Life

Page 2: Bio Ch1 Sec1 and 2

Biology - “the study of life”

the natural world

bacteria to elephants food to exerciseenvironment

bioethics - biology in context of society

Biology and You

Page 3: Bio Ch1 Sec1 and 2

Characteristics of Life

Life has changed since it first appeared on the planet, Today, biologist identify a living thing through

observation of shared characteristics.

Page 4: Bio Ch1 Sec1 and 2

Self-directed Organization

cell - basic unit of structure and function (organelles and biomolecules)

unicellular or multicellular

Organization

Page 5: Bio Ch1 Sec1 and 2

levels of organizationcells tissues organs organ system organism

population --> community -->ecosystem --> biome -->biosphere

Page 6: Bio Ch1 Sec1 and 2

stimulus-response

stimulus - causal event in environment

response - reaction to causal event

Response to Stimuli

Page 7: Bio Ch1 Sec1 and 2

responses in an organism which maintain stable internal conditions in a changing environment

light, temperature, water

Homeostasis

Page 8: Bio Ch1 Sec1 and 2

growth - increase in size

growth - increase in the number of cells through cell division

development - series of changes during growth due to cell specialization

Growth and Development

Page 9: Bio Ch1 Sec1 and 2

making more of ones own kind - species

asexual

sexual

Inherited set of instructions in the nucleic acids DNA or RNA

Reproduction

Page 10: Bio Ch1 Sec1 and 2

species change over time

mutation

variations in a population

differential survival due to “fitness”

Evolution

Page 11: Bio Ch1 Sec1 and 2

Energy required for each characteristic

metabolism - sum of chemical reactions to transform energy to a usable form

photosynthesis - respiration

provide material for growth and repair

Metabolism