Life Science I
83.101.102
Dr. Ekaterina (Kate) Vorotnikova
Office: 413b
E-mail: Ekaterina_Vorotnikova@uml.edu
Lecture 1
Introduction to Life Science I. The
characteristics of life.
(Page 1-8)
Wednesday, Feb.3, 9:00 a.m.9:50 a.m.
Dr. Mark Hines, Professor and Biological
Sciences Department Chair will give a
lecture on Climate changes
Life Science I
Presents environmental and
organismal structural
interrelationships and relates
these to the chemical evolutionary
basis of life.
Essentials of Biology Second Edition
Sylvia S. Mader with McGraw-Hill
Connect Biology
McGraw-Hill Connect Biology:
• is a web-based assignment and assessment platform that
gives students the means to better connect with their
coursework, with their instructors;
•with Connect Biology, instructors can deliver assignments,
quizzes and tests easily online;
• students can practice important skills at their own pace and
on their own schedule.
• with Connect Biology Plus, students also get online access
to an eBook—an online edition of the text—to aid them in
successfully completing their work, wherever and whenever
they choose.
Attendance
•
Attendance is required at all lectures.
•
Students who attend lectures regularly will
receive extra 5 points to their final grade.
•
The lecture slides in ppt will be placed on the
web site. Also, you will be able to see your
examination grades there
•
To see your grades and lectures you should
register
Registration to see exam grades and lectures
Go to http://evorotnikova.pageout.net
You will see Course Web Site
Click on Life Science I 83.101.201
Go to Student Registration and follow the instructions to register
Add your First Name
Last Name
User ID – any ID you like and DO NOT FORGET!
User password – any password you like and DO NOT FORGET!
After you register when you go to http://evorotnikova.pageout.net, then
click on Life Science I 83.101.201, then click on Web Links – you will see
the Lectures and syllabus in ppt.
If you click on GradeBook – you will see your grades.
DO NOT FORGET TO REGISTER!!!!
EXAMS
1. February 17 - 100 points
2. March 12 - 100 points
3. April 14 - 100 points
4. Final May 13-18 – to be announced,
100 points
Missed exams are counted as zero.
Assignments
•After each lecture students have an assignment that they should
do at their convenient time.
• On Monday and Wednesday an assignment will include 5-10
questions on a particular lecture material.
• Each Friday there will be an assignment on a Friday lecture + a
quiz on the material that includes 3 lectures of the week.
• Assignments and a quiz for a particular week are due at 11 p.m.
on Monday of the following week.
•Assignments will be posted on the Connect McGraw-Hill website
for which you should register.
Quizzes
Each Friday a quiz on the material that
includes 3 lectures of the week together with a
Friday lecture assignment will be posted on
the Connect McGraw-Hill website.
The quiz will have 10 questions, 10 points
each.
Quizzes and assignments will be done online
Student registration info
Course:
Life Science 83.101.102
Instructor: Ekaterina Vorotnikova
Section: Spring 2010 mwf 9 am
online registration instructions
Go to the following Web address
and click the "register now" button:
http://connect.mcgraw-hill.com/class/e_vorotnikova_spring_2010_mwf_9_am
(http://connect.mcgraw-hill.com/class/e_vorotnikova_spring_2010_mwf_9_am)
Web addresses cannot contain spaces. Use lowercase letters or numbers or special
characters ( '-' and '_' ) only.
This is a unique address for Spring 2010 mwf 9 am
If you have trouble with registration, please contact Customer Support at
http://mpss.mhhe.com
LearnSmart Study modules
Final grade
Grade for exams – 50%;
Grade for assignments – 20%;
Grade for LearnSmart – 10%
Grade for quizzes – 20%;
(100 points max + 5 points for
attendance.)
Total number of points -105.
Grade
A
AB+
B
BC+
C
CD+
D
F
Points
90 -- 100
87 -- 89
83 -- 86
80 -- 82
77 -- 79
73 -- 76
70 -- 72
65 -- 69
58 -- 64
50 -- 57
0 -- 49
Defining Life
Living things:
– Comprised of the same chemical elements e.g.
Carbon, Hydrogen, Oxygen, and Nitrogen
(96.3% of human body weight)
– Obey the same physical and chemical laws
– Living organisms consist of cells (Unicellular or
Multicellular).
• The cell is the basic structural and functional unit of
all living things e.g. plants, animals, and fungi
• Cells are produced from preexisting cells
• Cells are the smallest units that perform all vital
physiological functions
6,600
Escherichia coli
65,000
Cells are the structural and functional units of life
Nerve cell (neuron)
Fibroblasts
Red blood cells and
white blood cell
Living things
Are organized: there are different levels of biological
organization.
Acquire materials and energy: they process food to
maintain their metabolism.
Respond to stimuli: they interact with their
surrounding.
Reproduce and develop: make another organism like
itself.
Adapt to change: they modify to be better suited to
environment
LEVELS OF BIOLOGICAL ORGANIZATION
• Each level of organization has Emergent Properties
• Levels range from extreme micro (e.g. Atoms, Molecules and
Cells) to global (e.g. Community, Ecosystem and Biosphere)
• Each level of organization is more complex than the level
preceding it
All organisms need nutrients and
energy
Energy – required to maintaining organization and
conducting life-sustaining processes
The sun:
Ultimate source of energy for nearly all life on
Earth
Living things acquire nutrients.
Metabolism is all the chemical reactions that occur in a
cell or in an organism.
Homeostasis - Maintenance of internal conditions
within certain boundaries
LIVING THINGS RESPOND TO STIMULI
Living things interact with the
environment and respond to
changes in the environment
Response ensures survival of
the organism and it often results
movement
Vulture can detect and find
carcass a mile away and soar
toward dinner
Monarch butterfly senses approach of fall and migrates south
Microroganisms can sense light or chemicals
Even leaves of plants follow sun
Activities as a result of Responses are termed behavior
LIVING THINGS REPRODUCE AND DEVELOP
Organisms live and die
All living organisms must reproduce to
ensure continued existence and
maintain population
In most multicellular organisms
reproduction:
Begins with union of sperm and
egg (fertilization)
Followed by cell division and
differentiation
Developmental instructions
encoded in genes
Composed of DNA
Unicellular organisms reproduce by cell division
LIVING THINGS ADAPT TO CHANGE
Adaptation
Any modification that makes an
organism more suited to its way of life
Organisms become modified over long
period time
Respond to environmental changes
by developing new adaptations
However, organisms very similar at
basic level
Suggests living things descended
from same ancestor
Descent with modification Evolution
Caused by natural selection