biology 30 nov 2015 - steilacoom › cms › lib4... · prokaryote eukaryote does not enclose...
TRANSCRIPT
![Page 1: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/1.jpg)
BIOLOGY
30 Nov 2015
![Page 2: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/2.jpg)
Entry Task
Grab your science notebook from the front table. In your notebook… • List at least 3 things you know about cells • If you cannot think of any, look at figure 7-6, p. 196
for ideas.
![Page 3: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/3.jpg)
• Entry Task • Housekeeping • Chapter 7 Essential Question • Section 7.1 (Life is Cellular) • Exit Ticket
Agenda
![Page 4: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/4.jpg)
Housekeeping
Chapter 2 Exam • Study guide • Retake exam Notebooks • Organization
![Page 5: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/5.jpg)
Chapter 7 Cell Structure and Function
![Page 6: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/6.jpg)
Chpt 7 Essential Question
How are cell structures adapted to their functions?
p. 188
![Page 7: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/7.jpg)
Chapter 7 Sections
7.1 Life is Cellular • Why is it important to study cells? 7.2 Cell Structure • How do cell structures enable a cell to carry out basic life
processes? 7.3 Cell Transport • How does a cell transport materials across the cell
membrane? 7.4 Homeostasis and Cells • How does a cell maintain homeostasis both within itself
and as part of a multicellular organism?
![Page 8: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/8.jpg)
7.1 Life is Cellular
![Page 9: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/9.jpg)
Learning Objectives
7.1.1 State the cell theory. 7.1.2 Describe how the different types of microscopes work. 7.1.3 Distinguish between prokaryotes and eukaryotes.
![Page 10: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/10.jpg)
Learning Objectives
• p. 190 (Prokaryote) • Frayer Model
Prokaryote
Definition: Facts/Characteristics:
Sentence: Picture:
![Page 11: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/11.jpg)
Discovery of the Cell
Robert Hooke (1665) • Looked at nonliving cork through
early microscope. • Observed tiny empty chambers. • Called the chambers “cells”. Anton van Leeuwenhoek • Looked at living organisms in the human mouth. • Today they are called “bacteria”.
p. 190
![Page 12: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/12.jpg)
Discovery of the Cell
The Cell Theory • The cell discoveries made by
scientists were summarized in the “cell theory”.
• The cell theory states:
- All living things are made up of cells. - Cells are the basic units in living things. - New cells are produced from existing cells.
p. 191
Cork Cells
![Page 13: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/13.jpg)
Exploring the Cell
How do we observe cells? • Microscopes. How do microscopes work? • They use lenses to magnify the image of an object by
focusing light or electrons.
p. 191-192
![Page 14: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/14.jpg)
Exploring the Cell
Compound Light Electron Microscope Microscope
p. 191-192
![Page 15: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/15.jpg)
Prokaryotes & Eukaryotes
• Read p. 193-194 and identify similarities & differences. • The chart does not represent how many there are.
Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus
Contains a nucleus, enclosing genetic material (DNA)
Generally simpler and smaller (1-5 µm)
Larger and more complex (10-100 µm)
Contains a cell membrane Contains a cell membrane Within single celled organisms Within multicellular organisms Glides/slides through liquid Glides/slides through liquid (blood) Examples: Bacteria, Virus Examples: Animals, Plants, & Fungi
![Page 16: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/16.jpg)
Exit Ticket
Question: What is the most significant difference between prokaryote and eukaryote cells? Reflection: How will you remember this difference?
![Page 17: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/17.jpg)
BIOLOGY
1 Dec 2015
![Page 18: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/18.jpg)
Entry Task
In your notebook… • List as many cell organelles as you can.
![Page 19: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/19.jpg)
• Entry Task • Housekeeping • Section 7.2 (Cell Structure) • POGIL – Organelles in Eukaryotes • Chapter 2 Exam Review
Agenda
![Page 20: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/20.jpg)
Housekeeping
To be determined
![Page 21: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/21.jpg)
7.2 Cell Structure
![Page 22: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/22.jpg)
Learning Objectives
7.2.1 Describe the structure and function of the cell nucleus. 7.2.2 Describe the role of vacuoles, lysosomes, and cytoskeleton. 7.2.3 Identify the role of ribosomes, endoplasmic reticulum, and Golgi apparatus in making proteins.
![Page 23: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/23.jpg)
Learning Objectives
• p. 196 (Lysosome, Ribosome, & Chloroplasts) • Frayer Model
Lysosome
Definition: Facts/Characteristics:
Sentence: Picture:
![Page 24: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/24.jpg)
Cell Organization
Cells can be divided into 2 major components: • Nucleus • Cytoplasm = portion of the
cell outside the nucleus
Within the cytoplasm are…
• Organelles (“little organs”) = specialized organs within the cell.
p. 196
Nucleus Lysosome
Smooth Endoplasmic Reticulum
Rough Endoplasmic Reticulum
Golgi Apparatus
Nucleolus Chromatin
Centrioles
Cytoskeleton
Ribosome Cytoplasm Plasma Membrane Mitochondria
![Page 25: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/25.jpg)
Cell Organization
Eukaryotic cell = Factory • Organelles = Specialized machines & assembly lines. Nucleus = Main office • Control center. • Contains DNA. • Contains coded instructions for proteins & other
important molecules. p. 197
![Page 26: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/26.jpg)
Organelles that… Store
Vacuoles & Vesicles = Storage Facility • Stores materials like water, salts, proteins, &
carbohydrates.
p. 198
![Page 27: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/27.jpg)
Organelles that… Clean Up
Lysosome = Cleaning Crew • Breaks down lipids, carbohydrates, & proteins into
small molecules for use by the cell. • Involved in breaking down
organelles that have outlived their usefulness.
p. 198
Nucleus Lysosome
Smooth Endoplasmic Reticulum
Rough Endoplasmic Reticulum
Golgi Apparatus
Nucleolus Chromatin
Centrioles
Cytoskeleton
Ribosome Cytoplasm Plasma Membrane Mitochondria
![Page 28: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/28.jpg)
Organelles that… Support
Cytoskeleton = Steel/Concrete Beams • Helps maintain the cells
shape. • Involved in cell movement. • Made up of 2 principle
protein filaments:
- Microfilaments = flexible framework. - Microtubules = help separate chromosomes during cell division.
p. 199
Nucleus Lysosome
Smooth Endoplasmic Reticulum
Rough Endoplasmic Reticulum
Golgi Apparatus
Nucleolus Chromatin
Centrioles
Cytoskeleton
Ribosome Cytoplasm Plasma Membrane Mitochondria
![Page 29: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/29.jpg)
Organelles that… Build Proteins
Ribosomes = Making Proteins • Produces proteins
Rough Endoplasmic Reticulum • Assembles lipid components
of cell membrane Smooth Endoplasmic Reticulum • Synthesis of membrane lipids & detoxification of drugs
p. 200-201
Nucleus Lysosome
Smooth ER
Rough ER
Golgi Apparatus
Nucleolus Chromatin
Centrioles
Cytoskeleton
Ribosome Cytoplasm Plasma Membrane Mitochondria
![Page 30: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/30.jpg)
Organelles that… Build Proteins
Golgi Apparatus = Customization Shop • Modifies, sorts, & packages proteins and other
materials
p. 200-201
Nucleus Lysosome
Smooth ER
Rough ER
Golgi Apparatus
Nucleolus Chromatin
Centrioles
Cytoskeleton
Ribosome Cytoplasm Plasma Membrane Mitochondria
![Page 31: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/31.jpg)
BIOLOGY
2 Dec 2015
![Page 32: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/32.jpg)
Entry Task
Take the last few moments to study. • Be prepared to turn in study guide.
![Page 33: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/33.jpg)
• Entry Task • Chapter 2 Exam Retake • Housekeeping • Section 7.2 (Cell Structure) • POGIL – Organelles in Eukaryotes
Agenda
![Page 34: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/34.jpg)
Chapter 2 Exam
Clear off your desks. Remember this is an exam. • No talking. • Keep your eyes on your own paper. Do not write on the question sheet. When you are finished: • Place the question sheet and your answer sheet on the
front table face down. • Silently read chapter 7 or complete any missing
assignments.
![Page 35: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/35.jpg)
Housekeeping
To be determined
![Page 36: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/36.jpg)
7.2 Cell Structure Continued
![Page 37: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/37.jpg)
Learning Objectives
7.2.4 Describe the function of chloroplasts and mitochondria in the cell. 7.2.5 Describe the function of the cell membrane.
![Page 38: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/38.jpg)
Learning Objectives
• p. 196 (Mitochondria & Hypertonic) • Frayer Model
Mitochondria
Definition: Facts/Characteristics:
Sentence: Picture:
![Page 39: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/39.jpg)
BIOLOGY
3 Dec 2015
![Page 40: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/40.jpg)
Entry Task
To be determined.
![Page 41: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/41.jpg)
• Entry Task • Housekeeping • Section 7.2 (Cell Structure) • Exit Ticket
Agenda
![Page 42: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/42.jpg)
Housekeeping
To be determined
![Page 43: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/43.jpg)
7.3 Cell Transport
![Page 44: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/44.jpg)
Learning Objectives
7.3.1 State the cell theory. 7.3.2 Describe how the different types of microscopes work. 7.3.3 Distinguish between prokaryotes and eukaryotes.
![Page 45: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/45.jpg)
7.4 Homeostasis and Cells
![Page 46: BIOLOGY 30 Nov 2015 - Steilacoom › cms › lib4... · Prokaryote Eukaryote Does NOT enclose genetic material (DNA) within a nucleus Contains a nucleus, enclosing genetic material](https://reader033.vdocuments.us/reader033/viewer/2022053017/5f1c7062ae81ad2d9c634e44/html5/thumbnails/46.jpg)
Learning Objectives
7.4.1 Explain how unicellular organisms maintain homeostasis. 7.4.2 Explain how multicellular organisms maintain homeostasis.