Life Science I83.101.102

Dr. Ekaterina (Kate) VorotnikovaOffice: 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 EditionSylvia 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 lecturesGo 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 pointsMissed 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

Course: Life Science 83.101.102 

Student registration info

Instructor: Ekaterina Vorotnikova  

Section: Spring 2010 mwf 9 am 

online registration instructionsGo to the following Web addressand click the "register now" button:

http://connect.mcgraw-hill.com/class/e_vorotnikova_spring_2010_mwf_9_am

This is a unique address for 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.

If you have trouble with registration, please contact Customer Support at http://mpss.mhhe.com

LearnSmart Study modules

Final gradeGrade 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 PointsA 90 -- 100A- 87 -- 89B+ 83 -- 86B 80 -- 82B- 77 -- 79C+ 73 -- 76C 70 -- 72C- 65 -- 69D+ 58 -- 64D 50 -- 57F 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

65,000Escherichia coli

Red blood cells and white blood cell

Cells are the structural and functional units of life

Fibroblasts

Nerve cell (neuron)

Living thingsAre 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 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

LIVING THINGS RESPOND TO STIMULI

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 DNAUnicellular organisms reproduce by cell division

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

LIVING THINGS ADAPT TO CHANGE