Unit 1-Lesson 2

Question 1

What are the 8 characteristics of Life

Answer 1

1. Living things are made up cells
2. They are able to reproduce
3. All living things have the same genetic code
4. Growth and development occurs
5. Living things obtain and use material and energy
6. Living things respond to their environment
7. Living things maintain a stable internal environment
8. Living things change over time

Question 2

What are the levels of orginization?

Answer 2

1. Organism
2. Organ System
3. Organ
4. Tissue
5. Cell

Question 3

What are the two categories of cells?

Answer 3

Prokaryotic (original form of life)
Eukaryotic (newer form of life)

Question 4

What does a Prokaryotic cell contain?

Answer 4

no organized nucleus nor membrane bound organelles; found in bacteria and cyanobacteria

Question 5

What does a Eukaryotic cell contain?

Answer 5

do have an organized nucleus and membrane-bound organelles such as Golgi apparatus and mitochondria. All other organisms such as plants and animals have this kind of cell

Question 6

What are the two types of reproduction method?

Answer 6

Asexual and Sexual

Question 7

What is an asexual reproduction? and What is it good for?

Answer 7

only one parent and all offspring are identical; for example; binary fission of bacteria or amoebas
- good for organisms that are living in environments that goes through minimal changes because the cells are all the same, so if the environment changes then a asexual cell will not have the ability to change its cell quickly and will die off

Question 8

What is a sexual reproduction? and What is it good for?

Answer 8

two cells from different parent unite to produce the first cell of a new organisms
- can gives a lot of variety to different organisms

Question 9

What is the genetic alphabet?

Answer 9

DNA {AGCT}

Question 10

True and False: the genetic code is basically the same for all organisms on earth

Answer 10

True

Question 11

What are Autotrophs?

Answer 11

plants, most algae, and some bacteria obtain their energy directly from the sun through photosynthesis

Question 12

What is a stimulus?

Answer 12

A stimulus is a signal to which an organism responds

Question 13

What is an external stimuli?

Answer 13

External stimuli include temperature and light

Question 14

What is an internal stimuli?

Answer 14

Internal stimuli come from within, such as blood sugar level or feeling thirsty

Question 15

What is a heterotroph?

Answer 15

eats other organisms to survive

Question 16

What is Homeostasis?

Answer 16

Maintaining a stable internal environment