1.1 cell theory

Question 1

1. all organisms are made of one or more cells
2. cells are the smallest unit of life
3. all cells come from pre-existing cells

Answer 1

cell theory

Question 2

exception to cell theory that is hundreds of times longer and has multiple nuclei

Answer 2

striated muscle

Question 3

exception to cell theory that is a very large organism that is composed of one cell

Answer 3

giant algae

Question 4

exception to cell theory that is not divided into sections but does contain many nuclei

Answer 4

aseptate fungi

Question 5

metabolism
response
stable internal environment
growth
reproduction
excretion
nutrition

Answer 5

functions of life

Question 6

are viruses alive?

Answer 6

no

Question 7

magnification

Answer 7

image size / actual size

Question 8

actual size

Answer 8

image size / magnification

Question 9

volume

Answer 9

the inside of the cell

Question 10

surface area

Answer 10

membrane around the cell

Question 11

is it efficient for cells to grow instead of divide?

Answer 11

no

Question 12

1. growth in a multicellular organism
2. replace dead/damaged cells
3. reproduction in single-celled organisms

Answer 12

reasons for cell reproduction

Question 13

1. soon after conceptions, the cluster of identical cells is exposed to hormones
2. hormones reach certain parts of the cluster of cells
3. the hormones cause certain genes to be expressed but not others
4. having certain genes turned ‘on’ and others turned ‘off’ causes cells to develop into different types

Answer 13

process of cell differentiation in embryos

Question 14

an unspecialized type of cell

Answer 14

stem cell

Question 15

true or false:

embryonic stem cells can differentiate into any type of cell

Answer 15

true

Question 16

true or false:

adult stem cell can only differentiate into certain types of cell

Answer 16

true