Unit 1: What is Life

Question 1

What are the three domains of life?

Answer 1

Bacteria, archaea, eukarya

Question 2

Prokaryotes

Answer 2

Organisms whose cells lack a nucleus

Question 3

Eukarya (eukaryotes)

Answer 3

Organism with 1+ cells that contain a nucleus

Question 4

Which of the 3 domains of life are prokaryotic?

Answer 4

Bacteria & archaea

Question 5

Archaea are famous for inhabiting

Answer 5

Extreme environments

Question 6

Eukarya includes what four organisms?

Answer 6

Animals, plants, fungi & protists

Question 7

Protists

Answer 7

All eukaryotes that are not animals, plants or fungi

Question 8

Atom

Answer 8

Fundamental unit of matter/elements

Question 9

Molecule

Answer 9

2+ atoms held together by chemical bonds

Question 10

Macromolecule

Answer 10

Large molecule composed of subunits

Question 11

Organelle

Answer 11

Specialized subunit of cell

Question 12

Cell

Answer 12

The basic unit of life

Question 13

Tissue

Answer 13

Group of cells that carry out a similar function

Question 14

Organ

Answer 14

Group of tissues uniting for a common function

Question 15

Organ system

Answer 15

Group of organs working together

Question 16

Organism

Answer 16

An individual living being

Question 17

Population

Answer 17

Group of organisms living together of the same species

Question 18

Community

Answer 18

All populations in the same area

Question 19

Ecosystem

Answer 19

All living and non living things in an area

Question 20

Biosphere

Answer 20

All ecosystems on earth

Question 21

Four components that all cells share

Answer 21

Plasma membrane, cytoplasm, DNA, ribosomes

Question 22

What do ribosomes do?

Answer 22

Structures that synthesize protein

Question 23

Emergent property

Answer 23

New characteristics that arise at each level of complexity, that are not present in simpler levels

Question 24

Order of biological organization

Answer 24

Atom, molecule, macromolecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere

Question 25

The cell is the basic unit of life in terms of…

Answer 25

Structure and function

Question 26

ATP

Answer 26

Molecule used by cells to do “work”. The “energy currency” of the cell.

Question 27

What are the four major macromolecules?

Answer 27

Proteins, carbohydrates, nucleic acids, and lipids

Question 28

Evolution

Answer 28

Change in populations over time due to inherited (DNA) differences

Question 29

Functions of the cell membrane

Answer 29

Mediate communication Separate cell from universe Control enter/exit

Question 30

Are all organisms multicellular?

Answer 30

No they are unicellular and multicellular

Question 31

The plasma membrane is primarily made out of

Answer 31

Phospholipids

Question 32

In cells, the flow of information is from

Answer 32

DNA to RNA to protein

Question 33

Example of a macromolecule

Answer 33

DNA

Question 34

How old is the earth?

Answer 34

4.54 billion years old

Question 35

Membrane delimited

Answer 35

Selectively permeable barrier

Question 36

Homeostasis

Answer 36

Regulation of internal conditions

Question 37

Name some variables of homeostasis in the human body

Answer 37

Temperature, HR, BP, respiratory rate, fluid balance, blood sugar levels

Question 38

Classification of life

Answer 38

Taxonomy

Question 39

A bacterium is an example of a

Answer 39

cell and organism

Question 40

Virus cells lack

Answer 40

A cell membrane and ribosomes

Question 41

Major properties of cellular life include (4)

Answer 41

Membrane delimited, evolves, displays homeostasis, stores and uses energy

Question 42

Bacterium is an example of (3)

Answer 42

An organism and cell