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Flashcards in Chapter 3 Deck (20):
0

Robert Hooke discovered..

Cork Cells

1

Anton van Leewenhuek discovered..

living cells

2

Schlieden discovered..

Plants are made of cells

3

Schwan discovered..

All living things are made of cells

4

Define cell theory

Unifying concept of biology

5

Cell theory 3 principles:

-All organisms are made of cells;
-All cells are produced by other living cells;
-The cell is the basic unit of life

6

Levels of organization:

Cells
Tissue
Organ
System
Organism

7

What are the basic units of life?

Cells

8

Define tissue
Same basic

group of cells that have the same basic structure & function

9

Define Organ

Tissues grouped together to create complex functions

10

Define System

Group of organs working together to complete a function

11

Characteristics Shared by Most Cells:

Microscopic
Enclosed Membrane
Contains Cytoplasm

12

What is the structure of the nucleus?
double mem

is composed of Cell's DNA enclosed in double-membrane or Nuclear Envelope

13

What kind of cells were observed in the cheek lab?

Eukaryotic cells because you could see the nucleus

15

What are chromosomes made of?

DNA

16

What are chromosomes consisted of?
Instru..

contains instructions for traits & characteristics

17

What are cell membranes composed of?
2 pho..

2 phospholipid layers

18

What is the head & tail of a Phospholipid Bilayer?

Hydrophilic & Hydrophobic

19

Define the opposites Hydrophilic & Hydrophobic.

Hydrophilic: polar, likes & is attracted to water
Hydrophobic: non polar, does NOT like & repels water

20

Cell Wall is NEVER found in..

humans, us
(Mostly found in plants & bacteria)