Biology Do Now 2-1-19 Directions: Take out a sheet of notebook (Do Now sheet) and read the definition of the term homeostasis, then answer each question. Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment. [Homeo- means “similar to or like”; -stasis means “does not change”]   1) What does the word resist mean in the sentence “It was hard to resist not eating the last piece of chocolate cake.”? 2) What does the word maintain mean in the sentence “The college students tried to maintain a clean dorm room by sharing the cleaning responsibilities.”? 3) What does the word constant mean in the sentence “Earning a salary provides a constant supply of money to maintain decent lifestyle.”? 4) Work with a partner to create a definition for the term homeostasis without using your cell phone to “Google” it.

Biology Do Now 2-1-19 Key Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment. [Homeo- means “similar to or like”; -stasis means “does not change”]   1) What does the word resist mean in the sentence “It was hard to resist not eating the last piece of chocolate cake.”? Hold back 2) What does the word maintain mean in the sentence “The college students tried to maintain a clean dorm room by sharing the cleaning responsibilities.”? keep 3) What does the word constant mean in the sentence “Earning a salary provides a constant supply of money to maintain decent lifestyle.”? steady 4) Work with a partner to create a definition for the term homeostasis without using your cell phone to “Google” it. Keeping an internal environment the same without changing it

Please make sure you put your first and last name on your assignments so that you get the proper credit.

Home Assignment Get the expectation letter signed by parent or guardian (Due: February 5, 2019) Complete the Martian and the car worksheet.

Objectives Students will know the characteristics of living things by taking notes and completing a “Characteristics of Living Things” matching activity. Mastery: 70% (~10/15) or better.

If you have your expectation letter signed, take it out and turn it in for your 1st homework grade.

Unit 1 Vocabulary Words Alive Dead Abiotic Biotic Movement Respiration Sensitivity Growth Reproduction Excretion Nutrition

UNIT 1: STRUCTURE & FUNCTIONS Prepare to take notes. UNIT 1: STRUCTURE & FUNCTIONS Mr. Richards Characteristics of Living Things February 1, 2019

What is Biology? Biology is the science that seeks to understand the living world.

How can we define “life”?

Characteristics of Living Things Made up of units called cells Can reproduce Are based upon a universal genetic code Can grow and develop Obtain and use nutrients and energy Respond to their environment Maintain a stable internal environment Change over time (as a group)

Made of Cells Cell: the basic unit of living things Unicellular: made of one cell Multicellular: made of more than one cell

Reproduction Produce new organisms Sexual reproduction: 2 parent reproduction Asexual reproduction: 1 parent reproduction

Universal Genetic Code All living things contain the genetic code, DNA All living organisms follow this code Determines your inherited traits

Growth and Development Can lead to an increase in size, a change in form, or an increase in number

Obtain Nutrients and Energy Metabolism: (sum of an organism’s life processes) Autotrophs: obtain energy directly from sunlight by photosynthesis or chemosynthesis Heterotrophs: obtain energy by eating other organisms through cellular respiration

Respond to Environment Detect and respond to stimuli from their environment Stimuli: a signal to which an organism responds i.e. switching classes when the bell rings, pulling hand off a hot stove, Stimuli may be internal or external Internal—regulating blood sugar External—seeds germinating when soil is moist

Maintain a stable internal environment Homeostasis: process by which organisms maintain a stable internal environment Usually involves feedback mechanisms Such as the blood sugar example sweating Think of a thermostat

Maintain a stable internal environment Body systems included: Endocrine system—hormones Nervous system—uses nerve cells

Extend - Students will complete a worksheet involving matching the description with the characteristic of living things.

Exit Ticket: Use the eight characteristics of living things to determine if robots are more living or non-living. Support your explanation.