ch 1 Flashcards
1
Q
how many cell types are in humans
A
approx. 200
2
Q
how many cells are in a human body
A
trillions
3
Q
T or F: cells have the same DNA
A
true
4
Q
what are the three domains of life
A
bacteria
archaea
eukaryotes
5
Q
define bacteria
A
simple unicellular organisms
6
Q
define archaea
A
distinct unicellular organisms
7
Q
define eukaryotes
A
organisms with a nucleus
8
Q
define prokaryotes
A
lack nucleus and membrane bound organelles
9
Q
can eukaryotes be unicellular and multicellular
A
yes
10
Q
define organelles
A
specialized structures in a cell that have a specific functions
11
Q
cell membrane function
A
surround and protect cell
12
Q
cytoskeleton function
A
cell skeleton that gives cell shape
13
Q
nucleus function
A
hold DNA
14
Q
mitochondria function
A
produce energy for cell
15
Q
endoplasmic reticulum function
A
produce lipids and proteins
